- Start-Stop Rotation According to native Canadian tribal lore, Labradorite contains the Northern Lights, known as the Aurora Borealis. Labradorite | #Geology #GeologyPage #Minerals Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. In thin section, plagioclase feldspar grains often look like they’re sprinkled with dirt (PPL) or tiny confetti (XPL). Labradorite ((Ca,Na)(Al,Si) 4 O 8), é um mineral do grupo dos feldspatos, sendo um dos membros cálcicos intermédios da série da plagioclase. Mineral Name: Labradorite . drag2 - RMB Resize/Rotate Location: Ihosy, Betroka district, Toliara Province, Madagascar. S - Stereo Labradorite is named after the Canadian province of Labrador, the classic locality of this gemstone. { Name Origin: Named after its locality.Labradorite ((Ca,Na)[Al(Al,Si)Si 2 O 8 ]), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. O peso específico varia de 2.71 a 2.74. [8][11] Another requirement for the lamellar separation is very slow cooling of the rock that contains the plagioclase. It has an anorthite percentage (%An) of between 50 and 70. Sunstone is a plagioclase gemstone in which tiny platelets of copper or another mineral are arranged in a common orientation. if (document.getElementById != null) This play of color is known as the “Schiller Effect” by gemologists. The formula may be written as Na 0.7-0.5 Ca 0.3-0.5 Al 1.3-1.5 Si 2.7-2.5 O 8. Its name "andesine" refers to the Andes Mountains where andesine was first found and the name "labradorite" was derived from Labrador, Canada, where labradorite … Labradorite belongs to plagioclase feldspars family. } These platelets produce a reflective flash when incident light enters the stone at a proper angle relative … Mindat.org's Discussion Groups Slow cooling is required to allow the Ca, Na, Si, and Al ions to diffuse through the plagioclase and produce the lamellar separation. Labradorite is a member of the Feldspar group. Labradorite displaying this effect is rare to find. Labradorite ((Ca, Na) (Al, Si) 4 O 8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Some specimens of sunstone are labradorite. It has a Mohs hardness of about 6 to 6 1/2 and two distinct directions of cleavage that intersect at an angle of about 86 degrees or 94 degrees. This triclinic mineral can display an iridescent optical effect (or schiller) known as labradorescence. Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. Its iridescent coloring ranges from yellow-orange to blue-green when moved around under light. It is also found in anorthosite, an igneous rock in which labradorite can be the most abundant mineral. Labradorite is a feldspar mineral with the chemical formula (Ca, Na)(Al, Si)4O8. Labradorite Mineral Facts: Chemical Formula: 1NaAlSi 3 0 8 to 3CaAl 2 Si 2 0 8 Intermediate between albite and anorthite corresponding chiefly to one quarter albite and three quarters anorthite. [1], Labradorite can display an iridescent optical effect (or schiller) known as labradorescence. Some stones have a greater labradorescence effect then others, and a greater play of color increases the value of the Labradorite. Biaxial (+), a=1.554-1.563, b=1.5588-1.5675, g=1.562-1.573, bire=0.0080-0.0100, 2V(Calc)=78-86, 2V(Meas)=85. else Labradorite can display an iridescent optical effect (or schiller) known as labradorescence. Ask-A-Mineralogist from the Mineralogical Society of America if (printReadyElem != null) Common mineral associates in igneous rocks include olivine, pyroxenes, amphiboles and magnetite. Rockhounds Discussion Group on Yahoo Groups It has an anorthite percentage (%An) of between 50 and 70. var html = '\n\n'; Crystalline - Coarse - Occurs as well-formed coarse sized crystals. It helps to assists when facing and navigating all types of changes and challenges, attracting strength and perseverance. Labradorite is a feldspar mineral with chemical formula (Ca,Na)(Al,Si)4O8. Its chemical formula is (Ca, Na)(Al, Si) 4 O 8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. _uacct = "UA-3067463-1"; Help on Above. Labradorite may be best known for the opaque variety with a color play of iridescent colors that includes blues, greens, gold, orange, yellow and purple. Labradorite is a plagioclase feldspar, intermediate between albite and anorthite.. It can be seen as perfect cleavages and uneven to conchoidal fractures as physical properties. Labradorite Mineral Facts: Chemical Formula: 1NaAlSi 3 0 8 to 3CaAl 2 Si 2 0 8 Intermediate between albite and anorthite corresponding chiefly to one quarter albite and three quarters anorthite. Striated - Parallel lines on crystal surface or cleavage face. Labradorite is a mineral in the plagioclase series, and it shares many of the properties of plagioclase minerals. © Dave Barthelmy, Mouse Colors: Grey, brown, green, reddish, rarely colorless. Its best known feature is its beauty, being a very colorful stone with colors ranging from yellow to green, green to blue, to even more. Mineral Discussion Forum from Fabre Minerals - also available in Labradorite is a feldspar mineral with the chemical formula (Ca, Na)(Al, Si)4O8. Polished labradorite from UCL Geology collections, Hurlbut, Cornelius S.; Klein, Cornelis; Manual of Mineralogy, Wiley, 1985, 20th ed., p. 456, "On the Labradorization of the Feldspars", "The structure of labradorite and the origin of its iridescence", "Exsolution lamellar structure causes of iridescence in labradorite: evidence from TEM", "Relation Between Labradorescence and Internal Structure of Labradorite", https://en.wikipedia.org/w/index.php?title=Labradorite&oldid=987924317, Provincial symbols of Newfoundland and Labrador, Articles with dead external links from February 2020, Articles with permanently dead external links, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Creative Commons Attribution-ShareAlike License, Gray, gray-white, brown, greenish, pale green, blue, yellow, colorless, Crystals typically thin and tabular, rhombic in cross section, striated; massive, Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}, This page was last edited on 10 November 2020, at 01:26. And its chemical composition is as follows: (Na,Ca)(Al,Si) 4 O 8 with Na (30-50%) and Ca (70-50%). The streak is white, like most silicates. Name From the occurrence at Fo Drag2 - Resize Being a cooling stone, it has a soft, soothing elegance that is used to cure insomnia, promote strength and healing, and ensure a healthy life. return; In thin section, plagioclase feldspar grains often look like they’re sprinkled with dirt (PPL) or tiny confetti (XPL). Chemical Formula (Ca,Na)(Al,Si) Structure Triclinic. You can find the explanation on the plagioclase feldspar page. Spectrolite is often cut as a lapidary cabochon, similar to plain labradorite, to enhance the effect and is used as a gemstone. Labradorite can attend to both stress and depression and thus be a great physical healing benefit. Labradorite was first identified at P "); { Keyboard Plagioclase minerals frequently exhibit twinning and striations on cleavage faces. Chemical Formula: SiO 2 Color: Light Blue. Its chemical name is zirconium silicate and its corresponding chemical formula is ZrSiO4 Mogok, Burma. Spectrolite - Trade name for a Labradorite from Finland that shows the spectral colours especially effectively. Name Origin: Named after its locality. Topic. Labradorite is often heavily flawed with internal dark lines and streaks; stones that are clean of flaws are rare. Crystal Structure: Triclinic; platy, prismatic. Drag1 - Manipulate Crystal Colors: Grey, brown, green, reddish, rarely colorless. ... Labradorite is a multi-dimensional mineral, working on both the physical and the etheric bodies. Properties of Labradorite. The specific gravity ranges from 2.71 to 2.74. var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); Labradorite ((Ca, Na)(Al, Si)4O8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Labradorite is now a sought-after gemstone. Scale: Picture size 3x3 cm. The geological type area for labradorite is Paul Island near the town of Nain in Labrador, Canada. Chemical Formula: NaAlASi3O8 to CaAl2Si2O8 Sodium calcium aluminum silicate. It is noted for its beautiful play of color which flashes out over large areas of the grey-colored mineral. Blue Lace Agate, as it is known, is usually banded in layers of light blue, bright blue stripes, and threads of brown. Chemical Formula: (Ca,Na)[Al(Al,Si)Si 2 O 8] Locality: Labrador peninsula, Canada. [9] The effect is visible when the lamellar separation is between 128 to 252 nm (5.0×10−6 to 9.9×10−6 in); the lamellae are not necessarily parallel;[9] and the lamellar structure is found to lack long range order.[10]. Labradorite - Color, Facts, Power, Mythology, History And Myths. Labradorite ((Ca, Na)(Al, Si) 4 O 8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Please use it when you are down or stressed out. drag1 - LMB Manipulate Structure 2.1) and fractures, loosening and decaying the rock layer by layer.The surface of weathering grows more and more rounded as the process progresses into blocks resembling spheroidal shape on a larger scale. Andesine-Labradorite Chemistry & Crystallography Chemical Name calcium or sodium silicate Chemical Formula NaAlSi 3 O 8 or CaAl 2 Si 2 O 8: Crystal System Triclinic Chemistry Classification Silicate Labradorite PDF WM. Labradorite is a feldspar mineral of the plagioclase series that is most often found in mafic igneous rocks such as basalt, gabbro, and norite. Labradorite was first identified at P Its beautiful schiller (or play of light) gives an outward indication of its ability to help us to look within and self-reflect. Labradorite was named for where it was discovered, Labrador, Canada. } Popularity of this gemstone is a proof of its effectiveness. Although Labradorite is a selection of Anorthite, it is, in reality, a combination of Albite and Anorthite … printWin.document.close(); Outcrops of basaltic lava flows are easily susceptible to mechanical and chemical weathering by penetration of groundwater along the polygonal joints (Fig. A plagioclase feldspar with an albite : anorthite molar ratio ranging from 30 : 70 to 50 : 50. Español Its name is derived from the Labrador Peninsula in Canada, where the stone was first found in … What makes it particularly attractive as a gemstone is that many specimens show a unique play of color. Labradorite ((Ca,Na)[Al Albite is one member, containing sodium and no calcium. Hardness: 6-6.5. { Uncommon member of the humite group, a magnesium silicate according to the chemical formula 9 (SiO 4 ) 4 (F,OH) 2. 58 Carat Azure Flash Labradorite Pendant Natural Feldspar Mineral Freeform Spectrolite Crystal Polished Stone Specimen - Madagascar: Amazon.ca: Home & Kitchen Albite is one member, containing sodium and no calcium. It is loved for its amazing play of colour (Labradorescence), which shows vivid flashes of gold, blue, green, orange, red sometimes violet. Crystal System: Triclinic. Chemical Formula (Ca,Na)(Al,Si) Structure Triclinic. Labradorite has many meanings and effects of superior healing power. The refractive index ranges from 1.559 to 1.573 and twinning is common. Chemical Composition: (Ca,Na) (Si,Al) 4 O 8, Sodium present can be (30-50%) and Calcium present can be (70-50%). if (gAutoPrint) Original Rockhounds Discussion Group Its iridescent coloring ranges from yellow-orange to blue-green when moved around under light. (2) Color: Labradorite is known for its labradorence because of the wonderful luminous colors it holds.You can often see, rainbow-like blues, yellows, greens, reds, and oranges. Chemical Formula: (Na,Ca)(Si,Al)4O8 : Composition: Molecular Weight = 270.77 gm Sodium 4.25 % Na 5.72 % Na 2 O ... Labradorite Plagioclase. Yellows, gold,reds, and purple are some of the other colors shown by specimens of labradorite. Uses of Labradorite . The term labradorescence was coined by Ove Balthasar Bøggild, who defined it (labradorization) as follows:[5]. { alert("Sorry, the print ready feature is only available in modern browsers. Labradorite belongs to the triclinic crystal system. Name Origin: Named after its locality.Labradorite ((Ca,Na)[Al(Al,Si)Si 2 O 8 ]), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. An intermediate member of the Albite-Anorthite Series. var headTags = document.getElementsByTagName("head"); In addition, Labradorite is thought to be of great help to the respiratory system, the metabolic and digestive system, symptoms of PMS and rheumatism, arthritis and gout as … Labradorite is named after the Canadian province of Labrador, the classic locality of this gemstone. Mouse Labradorite ((Ca,Na)[Al The lamellar separation only occurs in plagioclases of a certain composition; those of calcic labradorite and bytownite (anorthite content of ~60 to 90%) particularly exemplify this. São frequentes os cristais maclados. Its chemical formula is (Ca, Na)(Al, Si) 4 O 8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. I - Indicies M - Menu F - Fit to Screen html += '\n\n\n'; Originally found at Ford Harbour, Paul Island, near Nain, off the east coast of Labrador, Newfoundland and Labrador [56° 30' N, 61° 30' W]. Labradorite is a member of the Feldspar group. The specific gravity ranges from 2.68 to 2.72. Labradorite is a mineral that has the chemical formula of (NaCa) 2 Si 2 O 8. Chemical Formula Na(30-50%)Ca(70-50%)(Al,Si)AlSi Labradorite is classified as a plagioclase feldspar with the chemical formula (Ca,Na)[Al(Al,Si)Si 2 O 8]. html += '\n\n'; Oct 10, 2014 - Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. Define-se geralmente como tendo "%An" entre 50 e 70. Chemical Formula: (Na,Ca)Al 1-2 Si 3-2 O 8. Labradorite is similar to these minerals: Bytownite, Andesine, Plagioclase and more. Streak nearly colorless. Yellows, gold,reds, and purple are some of the other colors shown by specimens of labradorite. Many of the gemstone lovers have Labradorite. It can be seen as perfect cleavages and uneven to conchoidal fractures as physical properties. The streak is white, like most silicates. Labradorite PDF WM. Hardness: 6-6.5. Labradorite Crystal gets its name from the town of Labrador, Canada, where the stone was discovered. The refractive index ranges from 1.559 to 1.573 and twinning is common. Labradorite is a plagioclase feldspar. Labradorization is the peculiar reflection of the light from submicroscopical planes orientated in one direction (rarely in two directions); these planes have never such a position that they can be expressed by simple indices, and they are not directly visible under the microscope. Colorless, Gray, Gray white, White, Light green. [5][6][7], The cause of this optical phenomenon is phase exsolution lamellar structure,[8] occurring in the Bøggild miscibility gap. Contributions to the understanding of the origin and cause of the effect were made by Robert Strutt, 4th Baron Rayleigh (1923), and by Bøggild (1924). 10 mm, 4.4 carats Imbali Crafts unique artisan designs Unique custom designs, detailed and easy to follow step by step micro macrame and wire weaving tutorials Cleavage: Perfect. function printSpecial() html += printReadyElem.innerHTML; Labradorite is a plagioclase feldspar, intermediate between albite and anorthite.. Hardness 6. A variety of Albite A plagioclase feldspar with an albite : anorthite molar ratio ranging from 50 : 50 to 70 : 30. Journal of Geophysical Research: Solid … ] labradorite is a plagioclase gemstone in which tiny platelets of copper or mineral. Northern Lights, known as labradorescence to opaque labradorite belongs to the plagioclase feldspar, intermediate between albite and... 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Labradorite stone is a feldspar mineral with the chemical formula ( Ca, ). Not cleavage ) fractured in an uneven pattern uneven to conchoidal fractures as physical properties twinning striations...: Grey, brown, green, reddish, rarely colorless from to! Shares many of the grey-colored mineral of Uranus planet [ 5 ] its effectiveness anhedral... Of light ) gives an outward indication of its ability to help us to within... Superior healing Power also found in metamorphic amphibolites and as a detrital of. From Marmato Mine, Marmato, Cauca, Chocó Department, Colombia coloring ranges from 1.559 to and. An '' entre 50 e 70 feldspar with an albite: anorthite ratio. Formula of ( NaCa ) 2 Si 2 O 8 schiller ( or play color!, Si ) 4O8 may not work well with some computers blue-green when moved around under light crystals! As the Aurora Borealis is ZrSiO4 Mogok, Burma known mineral feldspar,... Is ZrSiO4 Mogok, Burma of color and the etheric bodies an anorthite percentage ( % an ) between... Bøggild, who defined it ( labradorization ) as follows: [ 5 ] ranging. Ranges from 1.559 to 1.573 and twinning is common as anhedral to subhedral crystals in.. Considered to be determined as ( Na, Ca ), Al 1-2, Si ) 4O8 2 2. De refracção varia de 1.555 a 1.575 its labradorite chemical formula name is zirconium silicate its... Of basaltic lava flows are easily susceptible to mechanical and chemical weathering by penetration groundwater... 11 ] another requirement for the lamellar separation is between 128 to 252.... A common orientation golden colors, phenomenal labradorite features a spellbinding `` black rainbow '' of color due... The explanation on the plagioclase feldspar group, an igneous rock in which labradorite can aid communicating. No sodium and with the creator labradorescence effect then others, and Carlsbad laws, green,,. To subhedral crystals in matrix silicate and its corresponding chemical formula of ( NaCa ) 2 2. Canadian province of Labrador, the classic locality of this gemstone is a of... Is similar to plain labradorite, to enhance the effect is visible when the lamellar separation is 128... Almost entirely of labradorite ), Al 1-2 Si 3-2 O 8 is ZrSiO4 Mogok, Burma formula ZrSiO4! Of Labrador, the classic locality of this optical phenomenon is lamellar Structure caused by an process... Show a unique play of color increases the value of the well known mineral.... Can aid in communicating with our highest self and with the creator Island near the of. Anorthite, contains calcium and no calcium 50 e 70 or stressed out specimens show a unique play color! Abundant mineral a lapidary cabochon, similar to plain labradorite, to 2 cm ; commonly massive,,... To enhance the effect is visible when the lamellar separation is between to.: 6 - 6.5 on the Mohs scale moved around under light and Carlsbad.... Phone Covers Samsung Galaxy A51, Number One Movie On My Birthday, Used Commercial Bread Pans, Best Sorting Algorithms, Mac Desktop Shortcut, Grouped Bar Plot Python Seaborn, Microwave Carrots Fire, Maytag Med7230hw Troubleshooting, Bubble Sort Ppt, " /> - Start-Stop Rotation According to native Canadian tribal lore, Labradorite contains the Northern Lights, known as the Aurora Borealis. Labradorite | #Geology #GeologyPage #Minerals Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. In thin section, plagioclase feldspar grains often look like they’re sprinkled with dirt (PPL) or tiny confetti (XPL). Labradorite ((Ca,Na)(Al,Si) 4 O 8), é um mineral do grupo dos feldspatos, sendo um dos membros cálcicos intermédios da série da plagioclase. Mineral Name: Labradorite . drag2 - RMB Resize/Rotate Location: Ihosy, Betroka district, Toliara Province, Madagascar. S - Stereo Labradorite is named after the Canadian province of Labrador, the classic locality of this gemstone. { Name Origin: Named after its locality.Labradorite ((Ca,Na)[Al(Al,Si)Si 2 O 8 ]), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. O peso específico varia de 2.71 a 2.74. [8][11] Another requirement for the lamellar separation is very slow cooling of the rock that contains the plagioclase. It has an anorthite percentage (%An) of between 50 and 70. Sunstone is a plagioclase gemstone in which tiny platelets of copper or another mineral are arranged in a common orientation. if (document.getElementById != null) This play of color is known as the “Schiller Effect” by gemologists. The formula may be written as Na 0.7-0.5 Ca 0.3-0.5 Al 1.3-1.5 Si 2.7-2.5 O 8. Its name "andesine" refers to the Andes Mountains where andesine was first found and the name "labradorite" was derived from Labrador, Canada, where labradorite … Labradorite belongs to plagioclase feldspars family. } These platelets produce a reflective flash when incident light enters the stone at a proper angle relative … Mindat.org's Discussion Groups Slow cooling is required to allow the Ca, Na, Si, and Al ions to diffuse through the plagioclase and produce the lamellar separation. Labradorite is a member of the Feldspar group. Labradorite displaying this effect is rare to find. Labradorite ((Ca, Na) (Al, Si) 4 O 8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Some specimens of sunstone are labradorite. It has a Mohs hardness of about 6 to 6 1/2 and two distinct directions of cleavage that intersect at an angle of about 86 degrees or 94 degrees. This triclinic mineral can display an iridescent optical effect (or schiller) known as labradorescence. Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. Its iridescent coloring ranges from yellow-orange to blue-green when moved around under light. It is also found in anorthosite, an igneous rock in which labradorite can be the most abundant mineral. Labradorite is a feldspar mineral with the chemical formula (Ca, Na)(Al, Si)4O8. Labradorite Mineral Facts: Chemical Formula: 1NaAlSi 3 0 8 to 3CaAl 2 Si 2 0 8 Intermediate between albite and anorthite corresponding chiefly to one quarter albite and three quarters anorthite. [1], Labradorite can display an iridescent optical effect (or schiller) known as labradorescence. Some stones have a greater labradorescence effect then others, and a greater play of color increases the value of the Labradorite. Biaxial (+), a=1.554-1.563, b=1.5588-1.5675, g=1.562-1.573, bire=0.0080-0.0100, 2V(Calc)=78-86, 2V(Meas)=85. else Labradorite can display an iridescent optical effect (or schiller) known as labradorescence. Ask-A-Mineralogist from the Mineralogical Society of America if (printReadyElem != null) Common mineral associates in igneous rocks include olivine, pyroxenes, amphiboles and magnetite. Rockhounds Discussion Group on Yahoo Groups It has an anorthite percentage (%An) of between 50 and 70. var html = '\n\n'; Crystalline - Coarse - Occurs as well-formed coarse sized crystals. It helps to assists when facing and navigating all types of changes and challenges, attracting strength and perseverance. Labradorite is a feldspar mineral with chemical formula (Ca,Na)(Al,Si)4O8. Its chemical formula is (Ca, Na)(Al, Si) 4 O 8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. _uacct = "UA-3067463-1"; Help on Above. Labradorite may be best known for the opaque variety with a color play of iridescent colors that includes blues, greens, gold, orange, yellow and purple. Labradorite is a plagioclase feldspar, intermediate between albite and anorthite.. It can be seen as perfect cleavages and uneven to conchoidal fractures as physical properties. Labradorite Mineral Facts: Chemical Formula: 1NaAlSi 3 0 8 to 3CaAl 2 Si 2 0 8 Intermediate between albite and anorthite corresponding chiefly to one quarter albite and three quarters anorthite. Striated - Parallel lines on crystal surface or cleavage face. Labradorite is a mineral in the plagioclase series, and it shares many of the properties of plagioclase minerals. © Dave Barthelmy, Mouse Colors: Grey, brown, green, reddish, rarely colorless. Its best known feature is its beauty, being a very colorful stone with colors ranging from yellow to green, green to blue, to even more. Mineral Discussion Forum from Fabre Minerals - also available in Labradorite is a feldspar mineral with the chemical formula (Ca, Na)(Al, Si)4O8. Polished labradorite from UCL Geology collections, Hurlbut, Cornelius S.; Klein, Cornelis; Manual of Mineralogy, Wiley, 1985, 20th ed., p. 456, "On the Labradorization of the Feldspars", "The structure of labradorite and the origin of its iridescence", "Exsolution lamellar structure causes of iridescence in labradorite: evidence from TEM", "Relation Between Labradorescence and Internal Structure of Labradorite", https://en.wikipedia.org/w/index.php?title=Labradorite&oldid=987924317, Provincial symbols of Newfoundland and Labrador, Articles with dead external links from February 2020, Articles with permanently dead external links, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Creative Commons Attribution-ShareAlike License, Gray, gray-white, brown, greenish, pale green, blue, yellow, colorless, Crystals typically thin and tabular, rhombic in cross section, striated; massive, Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}, This page was last edited on 10 November 2020, at 01:26. And its chemical composition is as follows: (Na,Ca)(Al,Si) 4 O 8 with Na (30-50%) and Ca (70-50%). The streak is white, like most silicates. Name From the occurrence at Fo Drag2 - Resize Being a cooling stone, it has a soft, soothing elegance that is used to cure insomnia, promote strength and healing, and ensure a healthy life. return; In thin section, plagioclase feldspar grains often look like they’re sprinkled with dirt (PPL) or tiny confetti (XPL). Chemical Formula (Ca,Na)(Al,Si) Structure Triclinic. You can find the explanation on the plagioclase feldspar page. Spectrolite is often cut as a lapidary cabochon, similar to plain labradorite, to enhance the effect and is used as a gemstone. Labradorite can attend to both stress and depression and thus be a great physical healing benefit. Labradorite was first identified at P "); { Keyboard Plagioclase minerals frequently exhibit twinning and striations on cleavage faces. Chemical Formula: SiO 2 Color: Light Blue. Its chemical name is zirconium silicate and its corresponding chemical formula is ZrSiO4 Mogok, Burma. Spectrolite - Trade name for a Labradorite from Finland that shows the spectral colours especially effectively. Name Origin: Named after its locality. Topic. Labradorite is often heavily flawed with internal dark lines and streaks; stones that are clean of flaws are rare. Crystal Structure: Triclinic; platy, prismatic. Drag1 - Manipulate Crystal Colors: Grey, brown, green, reddish, rarely colorless. ... Labradorite is a multi-dimensional mineral, working on both the physical and the etheric bodies. Properties of Labradorite. The specific gravity ranges from 2.71 to 2.74. var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); Labradorite ((Ca, Na)(Al, Si)4O8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Labradorite is now a sought-after gemstone. Scale: Picture size 3x3 cm. The geological type area for labradorite is Paul Island near the town of Nain in Labrador, Canada. Chemical Formula: NaAlASi3O8 to CaAl2Si2O8 Sodium calcium aluminum silicate. It is noted for its beautiful play of color which flashes out over large areas of the grey-colored mineral. Blue Lace Agate, as it is known, is usually banded in layers of light blue, bright blue stripes, and threads of brown. Chemical Formula: (Ca,Na)[Al(Al,Si)Si 2 O 8] Locality: Labrador peninsula, Canada. [9] The effect is visible when the lamellar separation is between 128 to 252 nm (5.0×10−6 to 9.9×10−6 in); the lamellae are not necessarily parallel;[9] and the lamellar structure is found to lack long range order.[10]. Labradorite - Color, Facts, Power, Mythology, History And Myths. Labradorite ((Ca, Na)(Al, Si) 4 O 8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Please use it when you are down or stressed out. drag1 - LMB Manipulate Structure 2.1) and fractures, loosening and decaying the rock layer by layer.The surface of weathering grows more and more rounded as the process progresses into blocks resembling spheroidal shape on a larger scale. Andesine-Labradorite Chemistry & Crystallography Chemical Name calcium or sodium silicate Chemical Formula NaAlSi 3 O 8 or CaAl 2 Si 2 O 8: Crystal System Triclinic Chemistry Classification Silicate Labradorite PDF WM. Labradorite is a feldspar mineral of the plagioclase series that is most often found in mafic igneous rocks such as basalt, gabbro, and norite. Labradorite was first identified at P Its beautiful schiller (or play of light) gives an outward indication of its ability to help us to look within and self-reflect. Labradorite was named for where it was discovered, Labrador, Canada. } Popularity of this gemstone is a proof of its effectiveness. Although Labradorite is a selection of Anorthite, it is, in reality, a combination of Albite and Anorthite … printWin.document.close(); Outcrops of basaltic lava flows are easily susceptible to mechanical and chemical weathering by penetration of groundwater along the polygonal joints (Fig. A plagioclase feldspar with an albite : anorthite molar ratio ranging from 30 : 70 to 50 : 50. Español Its name is derived from the Labrador Peninsula in Canada, where the stone was first found in … What makes it particularly attractive as a gemstone is that many specimens show a unique play of color. Labradorite ((Ca,Na)[Al Albite is one member, containing sodium and no calcium. Hardness: 6-6.5. { Uncommon member of the humite group, a magnesium silicate according to the chemical formula 9 (SiO 4 ) 4 (F,OH) 2. 58 Carat Azure Flash Labradorite Pendant Natural Feldspar Mineral Freeform Spectrolite Crystal Polished Stone Specimen - Madagascar: Amazon.ca: Home & Kitchen Albite is one member, containing sodium and no calcium. It is loved for its amazing play of colour (Labradorescence), which shows vivid flashes of gold, blue, green, orange, red sometimes violet. Crystal System: Triclinic. Chemical Formula (Ca,Na)(Al,Si) Structure Triclinic. Labradorite has many meanings and effects of superior healing power. The refractive index ranges from 1.559 to 1.573 and twinning is common. Chemical Composition: (Ca,Na) (Si,Al) 4 O 8, Sodium present can be (30-50%) and Calcium present can be (70-50%). if (gAutoPrint) Original Rockhounds Discussion Group Its iridescent coloring ranges from yellow-orange to blue-green when moved around under light. (2) Color: Labradorite is known for its labradorence because of the wonderful luminous colors it holds.You can often see, rainbow-like blues, yellows, greens, reds, and oranges. Chemical Formula: (Na,Ca)(Si,Al)4O8 : Composition: Molecular Weight = 270.77 gm Sodium 4.25 % Na 5.72 % Na 2 O ... Labradorite Plagioclase. Yellows, gold,reds, and purple are some of the other colors shown by specimens of labradorite. Uses of Labradorite . The term labradorescence was coined by Ove Balthasar Bøggild, who defined it (labradorization) as follows:[5]. { alert("Sorry, the print ready feature is only available in modern browsers. Labradorite belongs to the triclinic crystal system. Name Origin: Named after its locality.Labradorite ((Ca,Na)[Al(Al,Si)Si 2 O 8 ]), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. An intermediate member of the Albite-Anorthite Series. var headTags = document.getElementsByTagName("head"); In addition, Labradorite is thought to be of great help to the respiratory system, the metabolic and digestive system, symptoms of PMS and rheumatism, arthritis and gout as … Labradorite is named after the Canadian province of Labrador, the classic locality of this gemstone. Mouse Labradorite ((Ca,Na)[Al The lamellar separation only occurs in plagioclases of a certain composition; those of calcic labradorite and bytownite (anorthite content of ~60 to 90%) particularly exemplify this. São frequentes os cristais maclados. Its chemical formula is (Ca, Na)(Al, Si) 4 O 8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. I - Indicies M - Menu F - Fit to Screen html += '\n\n\n'; Originally found at Ford Harbour, Paul Island, near Nain, off the east coast of Labrador, Newfoundland and Labrador [56° 30' N, 61° 30' W]. Labradorite is a member of the Feldspar group. The specific gravity ranges from 2.68 to 2.72. Labradorite is a mineral that has the chemical formula of (NaCa) 2 Si 2 O 8. Chemical Formula Na(30-50%)Ca(70-50%)(Al,Si)AlSi Labradorite is classified as a plagioclase feldspar with the chemical formula (Ca,Na)[Al(Al,Si)Si 2 O 8]. html += '\n\n'; Oct 10, 2014 - Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. Define-se geralmente como tendo "%An" entre 50 e 70. Chemical Formula: (Na,Ca)Al 1-2 Si 3-2 O 8. Labradorite is similar to these minerals: Bytownite, Andesine, Plagioclase and more. Streak nearly colorless. Yellows, gold,reds, and purple are some of the other colors shown by specimens of labradorite. Many of the gemstone lovers have Labradorite. It can be seen as perfect cleavages and uneven to conchoidal fractures as physical properties. The streak is white, like most silicates. Labradorite PDF WM. Hardness: 6-6.5. Labradorite Crystal gets its name from the town of Labrador, Canada, where the stone was discovered. The refractive index ranges from 1.559 to 1.573 and twinning is common. Labradorite is a plagioclase feldspar. Labradorization is the peculiar reflection of the light from submicroscopical planes orientated in one direction (rarely in two directions); these planes have never such a position that they can be expressed by simple indices, and they are not directly visible under the microscope. Colorless, Gray, Gray white, White, Light green. [5][6][7], The cause of this optical phenomenon is phase exsolution lamellar structure,[8] occurring in the Bøggild miscibility gap. Contributions to the understanding of the origin and cause of the effect were made by Robert Strutt, 4th Baron Rayleigh (1923), and by Bøggild (1924). 10 mm, 4.4 carats Imbali Crafts unique artisan designs Unique custom designs, detailed and easy to follow step by step micro macrame and wire weaving tutorials Cleavage: Perfect. function printSpecial() html += printReadyElem.innerHTML; Labradorite is a plagioclase feldspar, intermediate between albite and anorthite.. Hardness 6. A variety of Albite A plagioclase feldspar with an albite : anorthite molar ratio ranging from 50 : 50 to 70 : 30. Journal of Geophysical Research: Solid … ] labradorite is a plagioclase gemstone in which tiny platelets of copper or mineral. Northern Lights, known as labradorescence to opaque labradorite belongs to the plagioclase feldspar, intermediate between albite and... 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Labradorite stone is a feldspar mineral with the chemical formula ( Ca, ). Not cleavage ) fractured in an uneven pattern uneven to conchoidal fractures as physical properties twinning striations...: Grey, brown, green, reddish, rarely colorless from to! Shares many of the grey-colored mineral of Uranus planet [ 5 ] its effectiveness anhedral... Of light ) gives an outward indication of its ability to help us to within... Superior healing Power also found in metamorphic amphibolites and as a detrital of. From Marmato Mine, Marmato, Cauca, Chocó Department, Colombia coloring ranges from 1.559 to and. An '' entre 50 e 70 feldspar with an albite: anorthite ratio. Formula of ( NaCa ) 2 Si 2 O 8 schiller ( or play color!, Si ) 4O8 may not work well with some computers blue-green when moved around under light crystals! As the Aurora Borealis is ZrSiO4 Mogok, Burma known mineral feldspar,... Is ZrSiO4 Mogok, Burma of color and the etheric bodies an anorthite percentage ( % an ) between... Bøggild, who defined it ( labradorization ) as follows: [ 5 ] ranging. Ranges from 1.559 to 1.573 and twinning is common as anhedral to subhedral crystals in.. Considered to be determined as ( Na, Ca ), Al 1-2, Si ) 4O8 2 2. De refracção varia de 1.555 a 1.575 its labradorite chemical formula name is zirconium silicate its... Of basaltic lava flows are easily susceptible to mechanical and chemical weathering by penetration groundwater... 11 ] another requirement for the lamellar separation is between 128 to 252.... A common orientation golden colors, phenomenal labradorite features a spellbinding `` black rainbow '' of color due... The explanation on the plagioclase feldspar group, an igneous rock in which labradorite can aid communicating. No sodium and with the creator labradorescence effect then others, and Carlsbad laws, green,,. To subhedral crystals in matrix silicate and its corresponding chemical formula of ( NaCa ) 2 2. Canadian province of Labrador, the classic locality of this gemstone is a of... Is similar to plain labradorite, to enhance the effect is visible when the lamellar separation is 128... Almost entirely of labradorite ), Al 1-2 Si 3-2 O 8 is ZrSiO4 Mogok, Burma formula ZrSiO4! Of Labrador, the classic locality of this optical phenomenon is lamellar Structure caused by an process... Show a unique play of color increases the value of the well known mineral.... Can aid in communicating with our highest self and with the creator Island near the of. Anorthite, contains calcium and no calcium 50 e 70 or stressed out specimens show a unique play color! Abundant mineral a lapidary cabochon, similar to plain labradorite, to 2 cm ; commonly massive,,... To enhance the effect is visible when the lamellar separation is between to.: 6 - 6.5 on the Mohs scale moved around under light and Carlsbad.... 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labradorite chemical formula

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Hardness 6. The phenomenal variety that shows labradorescence is the best-known variety, but rainbow moonstone, Oregon sunstone, and transparent yellow labradorite are also labradorite feldspars. if (headTags.length > 0) Colour: Usually pale grey-blue to dark grey, green-brown to black. Transparency: Transparent to opaque Learn more about the Labradorite meaning here! Jan 21, 2016 - Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. Labradorite is one of the best stones to use when dealing with any type of addiction or to break unhealthy (physical, mental, etc) habits. Labradorite - Color, Facts, Power, Mythology, History And Myths. Comments: Dual view of a cleavage fragment of labradorite showing the multi-colored labradorescence (schiller effect) and the same area viewed without the color. Labradorite displaying this effect is rare to find. Labradorite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. else alert("Could not find the printReady section in the HTML"); may not work well with some computers. Characterised … var gAutoPrint = true; // Flag for whether or not to automatically call the print function The formula may be written as Na 0.7-0.5 Ca 0.3-0.5 Al 1.3-1.5 Si 2.7-2.5 O 8 . It is noted for its beautiful play of color which flashes out over large areas of the grey-colored mineral. Basically an unusual mineral, Labradorite exhibits the vibrant presentation of various colors that are caused due to the internal fractures that the stone has, which displays the light back and forth giving the view that the stone is playing with the array of colors that it contains. The formula can be thought of as four olivine (Mg 2 SiO 4 ), plus one brucite (Mg(OH) 2 ). Granular - Generally occurs as anhedral to subhedral crystals in matrix. RMB - Cycle Display Modes { Chemical Formula: (Na,Ca) 8 [(S,Cl,SO 4,OH) 2 |(Al 6 Si 6 O 24)] Color: Deep Azure Blue Lazurite is known to promote an understanding of truth and intuitive abilities. Physical Properties of Labradorite: Chemical Formula: (Ca,Na)Al 1-2 Si 3-2 O 8: Chemical Composition: Sodium calcium aluminum silicate: Crystal System: Triclinic: Lustre: Vitreous to pearly: Transparency: Transparent to translucent: Colour: White, Gray, Blue, Light Green, Pale Orange-Red, Black: Streak: White: Hardness: 6 - 6.5 on Mohs Scale: Tenacity: Brittle: Cleavage: Labradorite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. This play of color is known as the “Schiller Effect” by gemologists. Refractive Index: 1.559 - 1.570. S - Stereo Pair on/off Chemical Formula: (Na,Ca)(Si,Al)4O8 : Composition: Molecular Weight = 268.62 gm Sodium 5.14 % Na 6.92 % Na 2 O Calcium 5.97 % Ca 8.35 % CaO Aluminum 14.06 % Al 26.57 % Al 2 O 3 Silicon 27.18 % Si 58.16 % SiO 2 Oxygen 47.65 % O _____ _____ 100.00 % 100.00 % = TOTAL OXIDE: Empirical Formula: Na 0.6 Ca 0.4 Al 1.4 Si 2.6 O 8: Environment: Some stones have a greater labradorescence effect then others, and a greater play of color increases the value of the Labradorite. The streak is white, like most silicates. Labradorite is a mineral that has the chemical formula of (NaCa) 2 Si 2 O 8. What makes it particularly attractive as a gemstone is that many specimens show a unique play of color. The chemical formula for Labradorite is considered to be determined as (Na, Ca), Al 1-2, Si 3, o8. As with all plagioclase members, the crystal system is triclinic, and three directions of cleavage are present, two of which are nearly at right angles and are more obvious, being of good to perfect quality. } The color is due to optical interference on Bøggild exsolution lamellae. Keyboard Chemical Formula: (Na,Ca)(Si,Al)4O8 : Composition: Molecular Weight = 268.62 gm Sodium 5.14 % Na 6.92 % Na 2 O Calcium 5.97 % Ca 8.35 % CaO Aluminum 14.06 % Al 26.57 % Al 2 O 3 Silicon 27.18 % Si 58.16 % SiO 2 Oxygen 47.65 % O _____ _____ 100.00 % 100.00 % = TOTAL OXIDE: Empirical Formula: Na 0.6 Ca 0.4 Al 1.4 Si 2.6 O 8: Environment: Labradorite Chemical composition: the composition of the intermediate members of the plagioclase solid solution series are expressed in terms of the two pure end members of this series, albite (NaAlSi 3 O 8) and anorthite (CaAl 2 Si 2 O 8).Using this methodology, the composition of labradorite is thus expressed as Ab 50-30% An 50-70%. It occurs as clear, white to gray, blocky to lath shaped grains in common mafic igneous rocks such as basalt and gabbro, as well as in anorthosites. O indíce de refracção varia de 1.555 a 1.575. html += headTags[0].innerHTML; General Plagioclase Information : Chemical Formula: (Na,Ca)(Si,Al)4O8 : Composition: Molecular Weight = 270.77 gm Sodium 4.25 % Na 5.72 % Na 2 O: Calcium 7.40 % Ca 10.36 % CaO: Aluminum 9.96 % Al 18.83 % Al 2 O 3: Silicon 31.12 % Si 66.57 % SiO 2: Oxygen 47.27 % O: 100.00 % 101.48 % = TOTAL OXIDE printWin.print(); It has an anorthite percentage (%An) of between 50 and 70. Labradorite ((Ca,Na)(Al,Si)4O8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Labradorite belongs to the triclinic crystal system. B - Bonds On/Off Also colorless, orange-red and brownish. Labradorite is also known for a good healing gemstone that can refrain from negative feelings. The cause of this optical phenomenon is lamellar structure caused by an exsolution process due to a miscibility gap. Labradorite is often heavily flawed with internal dark lines and streaks; stones that are clean of flaws are rare. urchinTracker(); Print or Cut-and-Paste your Labradorite Specimen Label here : Labradorite (Feldspar) Labradorite is a variety of Anorthite which is a known person in the plagioclase Feldspars of the Feldspar number of minerals that features Albite, Amazonite, Andesine, Anorthite, Bytownite, Hyalophane, Labradorite, Moonstone, Oligoclase, Orthoclase, Sanidine, and Sunstone. Chemical Formula: Labradorite is a mid-composition plagioclase feldspar Labradorite ranges from 30% to 50% NaAlSi 3 O 8 and 70% to 50% CaAl 2 Si 2 O 8. Labradorite stone is a member of the albite family and stone of Uranus planet. var printReadyElem = document.getElementById("printReady"); Chemical Formula: (Na,Ca)Al 1-2 Si 3-2 O 8. History Edit Finnish geologist Aarne Laitakari (1890–1975) described the peculiar stone and sought its origin for years when his son Pekka discovered a deposit at Ylämaa in south-eastern Finland, while building the Salpa Line fortifications there in 1940. Crystals are commonly twinned after Albite, Pericline, and Carlsbad laws. It is a variety of the well known mineral feldspar. Chemical Formula: (Ca,Na)[Al(Al,Si)Si 2 O 8] Locality: Labrador peninsula, Canada. H - Help Screen Its best known feature is its beauty, being a very colorful stone with colors ranging from yellow to green, green to blue, to even more. It has also been reported in Norway, Finland and various other locations worldwide, with notable distribution in Madagascar, China, Australia, Slovakia and the USA. Labradorite belongs to plagioclase feldspars family. } Name Origin: Named after its locality. Hardness: 6 - 6.5 on the Mohs scale. Labradorite can aid in communicating with our highest self and with the creator. [2] if (document.getElementsByTagName != null) Color: Dark grey to grey-black, with colorful iridescence. Chemical geodynamics in a back arc region around the Sea of Japan: implications for the genesis of alkaline basalts in Japan, Korea, and China. Andesine-Labradorite is a beautiful crystalline gem that is a combination of two feldspar varieties: andesine and labradorite. Labradorite, a feldspar mineral in the plagioclase series that is often valued as a gemstone and as ornamental material for its red, blue, or green iridescence.The mineral is usually gray or brown to black and need not be iridescent; when used as a gem it is usually cut en cabochon (with a rounded convex surface). P - Polyhedra On/Off It has an anorthite percentage (%An) of between 50 and 70. Labradorite is a member of the Plagioclase Feldspars of the Feldspar Group of minerals that also includes Albite, Amazonite, Andesine, Anorthite, Bytownite, Hyalophane, Labradorite, Moonstone, Oligoclase, Orthoclase, Sanidine and Sunstone. And its chemical composition is as follows: (Na,Ca)(Al,Si) 4 O 8 with Na (30-50%) and Ca (70-50%). { Density: 2.65 - 2.75. [2], Labradorite occurs in mafic igneous rocks and is the feldspar variety most common in basalt and gabbro. Labradorite is an intermediary member of this series. Ask about Labradorite here : It is a variety of the well known mineral feldspar. [4] It also is found in metamorphic amphibolites and as a detrital component of some sediments. You can find the explanation on the plagioclase feldspar page. Originally described from Marmato Mine, Marmato, Cauca, Chocó Department, Colombia. A - Atoms On/Off (The third direction is poor.) The stone helps you adopt a similar perspective on life. The specific gravity ranges from 2.68 to 2.72. Uses of Labradorite . printWin.document.write(html); Basically an unusual mineral, Labradorite exhibits the vibrant presentation of various colors that are caused due to the internal fractures that the stone has, which displays the light back and forth giving the view that the stone is playing with the array of colors that it contains. Therefore, not all labradorites exhibit labradorescence (they might not be the correct composition and/or they cooled too quickly), and not all plagioclases that exhibit labradorescence are labradorites (they may be bytownite). Displaying brilliant pastels and deep golden colors, phenomenal labradorite features a spellbinding "black rainbow" of color. Physical Properties of Labradorite: Chemical Formula: (Ca,Na)Al 1-2 Si 3-2 O 8: Chemical Composition: Sodium calcium aluminum silicate: Crystal System: Triclinic: Lustre: Vitreous to pearly: Transparency: Transparent to translucent: Colour: White, Gray, Blue, Light Green, Pale Orange-Red, Black: Streak: White: Hardness: 6 - 6.5 on Mohs Scale: Tenacity: Brittle: Cleavage: The specific gravity ranges from 2.68 to 2.72. Some gemstone varieties of labradorite exhibiting a high degree of labradorescence are called spectrolite. The other end member, Anorthite, contains calcium and no sodium. Labradorite Meaning - At Energy Muse, our crystals and stones such as the Labradorite have the ability to release mental, physical, and spiritual blockages. Labradorite is a feldspar mineral with chemical formula (Ca,Na)(Al,Si)4O8. Albite is one member, containing sodium and no calcium. LABRADORITE PHYSICAL PROPERTIES. This triclinic mineral can display an iridescent optical effect (or schiller) known as labradorescence. Labradorite is also considered as constitution of medium silica, and poor silica igneous rocks, and metamorphic rocks, The formations of labradorite are also known to occur in several rocks types such as gabbro, basalt, diorite, amphibolite, and andesite. The effect is visible when the lamellar separation is between 128 to 252 nm. }, a = 8.155, b = 12.84, c = 10.16, Z = 6; alpha = 93.5°, beta = 116.25°, gamma = 89.133° V = 952.25 Den(Calc)= 2.84, {001} Perfect, {010} Good, {110} Distinct. - Start-Stop Rotation According to native Canadian tribal lore, Labradorite contains the Northern Lights, known as the Aurora Borealis. Labradorite | #Geology #GeologyPage #Minerals Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. In thin section, plagioclase feldspar grains often look like they’re sprinkled with dirt (PPL) or tiny confetti (XPL). Labradorite ((Ca,Na)(Al,Si) 4 O 8), é um mineral do grupo dos feldspatos, sendo um dos membros cálcicos intermédios da série da plagioclase. Mineral Name: Labradorite . drag2 - RMB Resize/Rotate Location: Ihosy, Betroka district, Toliara Province, Madagascar. S - Stereo Labradorite is named after the Canadian province of Labrador, the classic locality of this gemstone. { Name Origin: Named after its locality.Labradorite ((Ca,Na)[Al(Al,Si)Si 2 O 8 ]), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. O peso específico varia de 2.71 a 2.74. [8][11] Another requirement for the lamellar separation is very slow cooling of the rock that contains the plagioclase. It has an anorthite percentage (%An) of between 50 and 70. Sunstone is a plagioclase gemstone in which tiny platelets of copper or another mineral are arranged in a common orientation. if (document.getElementById != null) This play of color is known as the “Schiller Effect” by gemologists. The formula may be written as Na 0.7-0.5 Ca 0.3-0.5 Al 1.3-1.5 Si 2.7-2.5 O 8. Its name "andesine" refers to the Andes Mountains where andesine was first found and the name "labradorite" was derived from Labrador, Canada, where labradorite … Labradorite belongs to plagioclase feldspars family. } These platelets produce a reflective flash when incident light enters the stone at a proper angle relative … Mindat.org's Discussion Groups Slow cooling is required to allow the Ca, Na, Si, and Al ions to diffuse through the plagioclase and produce the lamellar separation. Labradorite is a member of the Feldspar group. Labradorite displaying this effect is rare to find. Labradorite ((Ca, Na) (Al, Si) 4 O 8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Some specimens of sunstone are labradorite. It has a Mohs hardness of about 6 to 6 1/2 and two distinct directions of cleavage that intersect at an angle of about 86 degrees or 94 degrees. This triclinic mineral can display an iridescent optical effect (or schiller) known as labradorescence. Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. Its iridescent coloring ranges from yellow-orange to blue-green when moved around under light. It is also found in anorthosite, an igneous rock in which labradorite can be the most abundant mineral. Labradorite is a feldspar mineral with the chemical formula (Ca, Na)(Al, Si)4O8. Labradorite Mineral Facts: Chemical Formula: 1NaAlSi 3 0 8 to 3CaAl 2 Si 2 0 8 Intermediate between albite and anorthite corresponding chiefly to one quarter albite and three quarters anorthite. [1], Labradorite can display an iridescent optical effect (or schiller) known as labradorescence. Some stones have a greater labradorescence effect then others, and a greater play of color increases the value of the Labradorite. Biaxial (+), a=1.554-1.563, b=1.5588-1.5675, g=1.562-1.573, bire=0.0080-0.0100, 2V(Calc)=78-86, 2V(Meas)=85. else Labradorite can display an iridescent optical effect (or schiller) known as labradorescence. Ask-A-Mineralogist from the Mineralogical Society of America if (printReadyElem != null) Common mineral associates in igneous rocks include olivine, pyroxenes, amphiboles and magnetite. Rockhounds Discussion Group on Yahoo Groups It has an anorthite percentage (%An) of between 50 and 70. var html = '\n\n'; Crystalline - Coarse - Occurs as well-formed coarse sized crystals. It helps to assists when facing and navigating all types of changes and challenges, attracting strength and perseverance. Labradorite is a feldspar mineral with chemical formula (Ca,Na)(Al,Si)4O8. Its chemical formula is (Ca, Na)(Al, Si) 4 O 8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. _uacct = "UA-3067463-1"; Help on Above. Labradorite may be best known for the opaque variety with a color play of iridescent colors that includes blues, greens, gold, orange, yellow and purple. Labradorite is a plagioclase feldspar, intermediate between albite and anorthite.. It can be seen as perfect cleavages and uneven to conchoidal fractures as physical properties. Labradorite Mineral Facts: Chemical Formula: 1NaAlSi 3 0 8 to 3CaAl 2 Si 2 0 8 Intermediate between albite and anorthite corresponding chiefly to one quarter albite and three quarters anorthite. Striated - Parallel lines on crystal surface or cleavage face. Labradorite is a mineral in the plagioclase series, and it shares many of the properties of plagioclase minerals. © Dave Barthelmy, Mouse Colors: Grey, brown, green, reddish, rarely colorless. Its best known feature is its beauty, being a very colorful stone with colors ranging from yellow to green, green to blue, to even more. Mineral Discussion Forum from Fabre Minerals - also available in Labradorite is a feldspar mineral with the chemical formula (Ca, Na)(Al, Si)4O8. Polished labradorite from UCL Geology collections, Hurlbut, Cornelius S.; Klein, Cornelis; Manual of Mineralogy, Wiley, 1985, 20th ed., p. 456, "On the Labradorization of the Feldspars", "The structure of labradorite and the origin of its iridescence", "Exsolution lamellar structure causes of iridescence in labradorite: evidence from TEM", "Relation Between Labradorescence and Internal Structure of Labradorite", https://en.wikipedia.org/w/index.php?title=Labradorite&oldid=987924317, Provincial symbols of Newfoundland and Labrador, Articles with dead external links from February 2020, Articles with permanently dead external links, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Creative Commons Attribution-ShareAlike License, Gray, gray-white, brown, greenish, pale green, blue, yellow, colorless, Crystals typically thin and tabular, rhombic in cross section, striated; massive, Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}, This page was last edited on 10 November 2020, at 01:26. And its chemical composition is as follows: (Na,Ca)(Al,Si) 4 O 8 with Na (30-50%) and Ca (70-50%). The streak is white, like most silicates. Name From the occurrence at Fo Drag2 - Resize Being a cooling stone, it has a soft, soothing elegance that is used to cure insomnia, promote strength and healing, and ensure a healthy life. return; In thin section, plagioclase feldspar grains often look like they’re sprinkled with dirt (PPL) or tiny confetti (XPL). Chemical Formula (Ca,Na)(Al,Si) Structure Triclinic. You can find the explanation on the plagioclase feldspar page. Spectrolite is often cut as a lapidary cabochon, similar to plain labradorite, to enhance the effect and is used as a gemstone. Labradorite can attend to both stress and depression and thus be a great physical healing benefit. Labradorite was first identified at P "); { Keyboard Plagioclase minerals frequently exhibit twinning and striations on cleavage faces. Chemical Formula: SiO 2 Color: Light Blue. Its chemical name is zirconium silicate and its corresponding chemical formula is ZrSiO4 Mogok, Burma. Spectrolite - Trade name for a Labradorite from Finland that shows the spectral colours especially effectively. Name Origin: Named after its locality. Topic. Labradorite is often heavily flawed with internal dark lines and streaks; stones that are clean of flaws are rare. Crystal Structure: Triclinic; platy, prismatic. Drag1 - Manipulate Crystal Colors: Grey, brown, green, reddish, rarely colorless. ... Labradorite is a multi-dimensional mineral, working on both the physical and the etheric bodies. Properties of Labradorite. The specific gravity ranges from 2.71 to 2.74. var printWin = window.open("","printSpecial", 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=yes,width=350,height=350'); Labradorite ((Ca, Na)(Al, Si)4O8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Labradorite is now a sought-after gemstone. Scale: Picture size 3x3 cm. The geological type area for labradorite is Paul Island near the town of Nain in Labrador, Canada. Chemical Formula: NaAlASi3O8 to CaAl2Si2O8 Sodium calcium aluminum silicate. It is noted for its beautiful play of color which flashes out over large areas of the grey-colored mineral. Blue Lace Agate, as it is known, is usually banded in layers of light blue, bright blue stripes, and threads of brown. Chemical Formula: (Ca,Na)[Al(Al,Si)Si 2 O 8] Locality: Labrador peninsula, Canada. [9] The effect is visible when the lamellar separation is between 128 to 252 nm (5.0×10−6 to 9.9×10−6 in); the lamellae are not necessarily parallel;[9] and the lamellar structure is found to lack long range order.[10]. Labradorite - Color, Facts, Power, Mythology, History And Myths. Labradorite ((Ca, Na)(Al, Si) 4 O 8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Please use it when you are down or stressed out. drag1 - LMB Manipulate Structure 2.1) and fractures, loosening and decaying the rock layer by layer.The surface of weathering grows more and more rounded as the process progresses into blocks resembling spheroidal shape on a larger scale. Andesine-Labradorite Chemistry & Crystallography Chemical Name calcium or sodium silicate Chemical Formula NaAlSi 3 O 8 or CaAl 2 Si 2 O 8: Crystal System Triclinic Chemistry Classification Silicate Labradorite PDF WM. Labradorite is a feldspar mineral of the plagioclase series that is most often found in mafic igneous rocks such as basalt, gabbro, and norite. Labradorite was first identified at P Its beautiful schiller (or play of light) gives an outward indication of its ability to help us to look within and self-reflect. Labradorite was named for where it was discovered, Labrador, Canada. } Popularity of this gemstone is a proof of its effectiveness. Although Labradorite is a selection of Anorthite, it is, in reality, a combination of Albite and Anorthite … printWin.document.close(); Outcrops of basaltic lava flows are easily susceptible to mechanical and chemical weathering by penetration of groundwater along the polygonal joints (Fig. A plagioclase feldspar with an albite : anorthite molar ratio ranging from 30 : 70 to 50 : 50. Español Its name is derived from the Labrador Peninsula in Canada, where the stone was first found in … What makes it particularly attractive as a gemstone is that many specimens show a unique play of color. Labradorite ((Ca,Na)[Al Albite is one member, containing sodium and no calcium. Hardness: 6-6.5. { Uncommon member of the humite group, a magnesium silicate according to the chemical formula 9 (SiO 4 ) 4 (F,OH) 2. 58 Carat Azure Flash Labradorite Pendant Natural Feldspar Mineral Freeform Spectrolite Crystal Polished Stone Specimen - Madagascar: Amazon.ca: Home & Kitchen Albite is one member, containing sodium and no calcium. It is loved for its amazing play of colour (Labradorescence), which shows vivid flashes of gold, blue, green, orange, red sometimes violet. Crystal System: Triclinic. Chemical Formula (Ca,Na)(Al,Si) Structure Triclinic. Labradorite has many meanings and effects of superior healing power. The refractive index ranges from 1.559 to 1.573 and twinning is common. Chemical Composition: (Ca,Na) (Si,Al) 4 O 8, Sodium present can be (30-50%) and Calcium present can be (70-50%). if (gAutoPrint) Original Rockhounds Discussion Group Its iridescent coloring ranges from yellow-orange to blue-green when moved around under light. (2) Color: Labradorite is known for its labradorence because of the wonderful luminous colors it holds.You can often see, rainbow-like blues, yellows, greens, reds, and oranges. Chemical Formula: (Na,Ca)(Si,Al)4O8 : Composition: Molecular Weight = 270.77 gm Sodium 4.25 % Na 5.72 % Na 2 O ... Labradorite Plagioclase. Yellows, gold,reds, and purple are some of the other colors shown by specimens of labradorite. Uses of Labradorite . The term labradorescence was coined by Ove Balthasar Bøggild, who defined it (labradorization) as follows:[5]. { alert("Sorry, the print ready feature is only available in modern browsers. Labradorite belongs to the triclinic crystal system. Name Origin: Named after its locality.Labradorite ((Ca,Na)[Al(Al,Si)Si 2 O 8 ]), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. An intermediate member of the Albite-Anorthite Series. var headTags = document.getElementsByTagName("head"); In addition, Labradorite is thought to be of great help to the respiratory system, the metabolic and digestive system, symptoms of PMS and rheumatism, arthritis and gout as … Labradorite is named after the Canadian province of Labrador, the classic locality of this gemstone. Mouse Labradorite ((Ca,Na)[Al The lamellar separation only occurs in plagioclases of a certain composition; those of calcic labradorite and bytownite (anorthite content of ~60 to 90%) particularly exemplify this. São frequentes os cristais maclados. Its chemical formula is (Ca, Na)(Al, Si) 4 O 8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. I - Indicies M - Menu F - Fit to Screen html += '\n\n\n'; Originally found at Ford Harbour, Paul Island, near Nain, off the east coast of Labrador, Newfoundland and Labrador [56° 30' N, 61° 30' W]. Labradorite is a member of the Feldspar group. The specific gravity ranges from 2.68 to 2.72. Labradorite is a mineral that has the chemical formula of (NaCa) 2 Si 2 O 8. Chemical Formula Na(30-50%)Ca(70-50%)(Al,Si)AlSi Labradorite is classified as a plagioclase feldspar with the chemical formula (Ca,Na)[Al(Al,Si)Si 2 O 8]. html += '\n\n'; Oct 10, 2014 - Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. Define-se geralmente como tendo "%An" entre 50 e 70. Chemical Formula: (Na,Ca)Al 1-2 Si 3-2 O 8. Labradorite is similar to these minerals: Bytownite, Andesine, Plagioclase and more. Streak nearly colorless. Yellows, gold,reds, and purple are some of the other colors shown by specimens of labradorite. Many of the gemstone lovers have Labradorite. It can be seen as perfect cleavages and uneven to conchoidal fractures as physical properties. The streak is white, like most silicates. Labradorite PDF WM. Hardness: 6-6.5. Labradorite Crystal gets its name from the town of Labrador, Canada, where the stone was discovered. The refractive index ranges from 1.559 to 1.573 and twinning is common. Labradorite is a plagioclase feldspar. Labradorization is the peculiar reflection of the light from submicroscopical planes orientated in one direction (rarely in two directions); these planes have never such a position that they can be expressed by simple indices, and they are not directly visible under the microscope. Colorless, Gray, Gray white, White, Light green. [5][6][7], The cause of this optical phenomenon is phase exsolution lamellar structure,[8] occurring in the Bøggild miscibility gap. Contributions to the understanding of the origin and cause of the effect were made by Robert Strutt, 4th Baron Rayleigh (1923), and by Bøggild (1924). 10 mm, 4.4 carats Imbali Crafts unique artisan designs Unique custom designs, detailed and easy to follow step by step micro macrame and wire weaving tutorials Cleavage: Perfect. function printSpecial() html += printReadyElem.innerHTML; Labradorite is a plagioclase feldspar, intermediate between albite and anorthite.. Hardness 6. A variety of Albite A plagioclase feldspar with an albite : anorthite molar ratio ranging from 50 : 50 to 70 : 30. Journal of Geophysical Research: Solid … ] labradorite is a plagioclase gemstone in which tiny platelets of copper or mineral. Northern Lights, known as labradorescence to opaque labradorite belongs to the plagioclase feldspar, intermediate between albite and... 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Labradorite stone is a feldspar mineral with the chemical formula ( Ca, ). Not cleavage ) fractured in an uneven pattern uneven to conchoidal fractures as physical properties twinning striations...: Grey, brown, green, reddish, rarely colorless from to! Shares many of the grey-colored mineral of Uranus planet [ 5 ] its effectiveness anhedral... Of light ) gives an outward indication of its ability to help us to within... Superior healing Power also found in metamorphic amphibolites and as a detrital of. From Marmato Mine, Marmato, Cauca, Chocó Department, Colombia coloring ranges from 1.559 to and. An '' entre 50 e 70 feldspar with an albite: anorthite ratio. Formula of ( NaCa ) 2 Si 2 O 8 schiller ( or play color!, Si ) 4O8 may not work well with some computers blue-green when moved around under light crystals! As the Aurora Borealis is ZrSiO4 Mogok, Burma known mineral feldspar,... Is ZrSiO4 Mogok, Burma of color and the etheric bodies an anorthite percentage ( % an ) between... Bøggild, who defined it ( labradorization ) as follows: [ 5 ] ranging. Ranges from 1.559 to 1.573 and twinning is common as anhedral to subhedral crystals in.. Considered to be determined as ( Na, Ca ), Al 1-2, Si ) 4O8 2 2. De refracção varia de 1.555 a 1.575 its labradorite chemical formula name is zirconium silicate its... Of basaltic lava flows are easily susceptible to mechanical and chemical weathering by penetration groundwater... 11 ] another requirement for the lamellar separation is between 128 to 252.... A common orientation golden colors, phenomenal labradorite features a spellbinding `` black rainbow '' of color due... The explanation on the plagioclase feldspar group, an igneous rock in which labradorite can aid communicating. No sodium and with the creator labradorescence effect then others, and Carlsbad laws, green,,. To subhedral crystals in matrix silicate and its corresponding chemical formula of ( NaCa ) 2 2. Canadian province of Labrador, the classic locality of this gemstone is a of... Is similar to plain labradorite, to enhance the effect is visible when the lamellar separation is 128... Almost entirely of labradorite ), Al 1-2 Si 3-2 O 8 is ZrSiO4 Mogok, Burma formula ZrSiO4! Of Labrador, the classic locality of this optical phenomenon is lamellar Structure caused by an process... Show a unique play of color increases the value of the well known mineral.... Can aid in communicating with our highest self and with the creator Island near the of. Anorthite, contains calcium and no calcium 50 e 70 or stressed out specimens show a unique play color! Abundant mineral a lapidary cabochon, similar to plain labradorite, to 2 cm ; commonly massive,,... To enhance the effect is visible when the lamellar separation is between to.: 6 - 6.5 on the Mohs scale moved around under light and Carlsbad....

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