The uncommon anorthosite bodies are composed almost entirely of labradorite. Its name is derived from the Labrador Peninsula in Canada, where the stone was first found in … Location: Ihosy, Betroka district, Toliara Province, Madagascar. Labradorite is a member of the Feldspar group. Hardness 6. This play of color is known as the “Schiller Effect” by gemologists. Labradorite is often heavily flawed with internal dark lines and streaks; stones that are clean of flaws are rare. Chemical Formula (Ca,Na)(Al,Si) Structure Triclinic. 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. Hardness: 6-6.5. html += printReadyElem.innerHTML; The streak is white, like most silicates. Labradorite stone is a member of the albite family and stone of Uranus planet. [2], Labradorite occurs in mafic igneous rocks and is the feldspar variety most common in basalt and gabbro. "); } { Labradorite was first identified at P The term labradorescence was coined by Ove Balthasar Bøggild, who defined it (labradorization) as follows:[5]. else Labradorite is similar to these minerals: Bytownite, Andesine, Plagioclase and more. Labradorite ((Ca,Na)(Al,Si)4O8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Chemical Formula Na(30-50%)Ca(70-50%)(Al,Si)AlSi Topic. Originally found at Ford Harbour, Paul Island, near Nain, off the east coast of Labrador, Newfoundland and Labrador [56° 30' N, 61° 30' W]. Mineral Name: Labradorite . var headTags = document.getElementsByTagName("head"); Labradorite is a feldspar mineral with the chemical formula (Ca, Na)(Al, Si)4O8. Labradorite ((Ca, Na)(Al, Si)4O8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Hardness: 6-6.5. Jan 21, 2016 - Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. It has also been reported in Norway, Finland and various other locations worldwide, with notable distribution in Madagascar, China, Australia, Slovakia and the USA. It has an anorthite percentage (%An) of between 50 and 70. Blue Lace Agate, as it is known, is usually banded in layers of light blue, bright blue stripes, and threads of brown. Hardness: 6 - 6.5 on the Mohs scale. { Labradorite is now a sought-after gemstone. [4] It also is found in metamorphic amphibolites and as a detrital component of some sediments. 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 … Granular - Generally occurs as anhedral to subhedral crystals in matrix. 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 play of color is known as the “Schiller Effect” by gemologists. The refractive index ranges from 1.559 to 1.573 and twinning is common. 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. In thin section, plagioclase feldspar grains often look like they’re sprinkled with dirt (PPL) or tiny confetti (XPL). Sunstone is a plagioclase gemstone in which tiny platelets of copper or another mineral are arranged in a common orientation. Labradorite is a plagioclase feldspar, intermediate between albite and anorthite.. It is a variety of the well known mineral feldspar. 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. Albite is one member, containing sodium and no calcium. Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. { if (headTags.length > 0) else 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: [2] Colors: Grey, brown, green, reddish, rarely colorless. Some stones have a greater labradorescence effect then others, and a greater play of color increases the value of the Labradorite. Help on Above, Wenk H R , Joswig W , Tagai T , Korekawa M , Smith B K , American Mineralogist , 65 (1980) p.81-95, The average structure of An 62-66 labradorite, Surtsey x-ray, feldspar. Some specimens of sunstone are labradorite. 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: var html = '\n\n'; drag2 - RMB Resize/Rotate Yellows, gold,reds, and purple are some of the other colors shown by specimens of labradorite. 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. 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). 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: html += '\n\n\n'; Chemical Formula: SiO 2 Color: Light Blue. Labradorite belongs to the triclinic crystal system. - Start-Stop Rotation It can be seen as perfect cleavages and uneven to conchoidal fractures as physical properties. Labradorite is a plagioclase feldspar, intermediate between albite and anorthite.. Hardness 6. 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. And its chemical composition is as follows: (Na,Ca)(Al,Si) 4 O 8 with Na (30-50%) and Ca (70-50%). The specific gravity ranges from 2.71 to 2.74. Displaying brilliant pastels and deep golden colors, phenomenal labradorite features a spellbinding "black rainbow" of color. Cleavage: Perfect. The chemical formula for Labradorite is considered to be determined as (Na, Ca), Al 1-2, Si 3, o8. The formula can be thought of as four olivine (Mg 2 SiO 4 ), plus one brucite (Mg(OH) 2 ). 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 Labradorite is a member of the Feldspar group. Colors: Grey, brown, green, reddish, rarely colorless. Chemical Formula: (Na,Ca)(Si,Al)4O8 : Composition: Molecular Weight = 270.77 gm Sodium 4.25 % Na 5.72 % Na 2 O ... Labradorite Plagioclase. Original Rockhounds Discussion Group Uses of Labradorite . It has an anorthite percentage (%An) of between 50 and 70. I - Indicies The specific gravity ranges from 2.68 to 2.72. 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. 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 [8][11] Another requirement for the lamellar separation is very slow cooling of the rock that contains the plagioclase. Labradorite was first identified at P 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'); The effect is visible when the lamellar separation is between 128 to 252 nm. Its chemical formula is (Ca, Na)(Al, Si) 4 O 8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. 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. [1], Labradorite can display an iridescent optical effect (or schiller) known as labradorescence. Labradorite can display an iridescent optical effect (or schiller) known as labradorescence. The refractive index ranges from 1.559 to 1.573 and twinning is common. Many of the gemstone lovers have Labradorite. It helps to assists when facing and navigating all types of changes and challenges, attracting strength and perseverance. B - Bonds On/Off 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. 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). RMB - Cycle Display Modes LABRADORITE PHYSICAL PROPERTIES. 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%. (The third direction is poor.) Labradorite can attend to both stress and depression and thus be a great physical healing benefit. Slow cooling is required to allow the Ca, Na, Si, and Al ions to diffuse through the plagioclase and produce the lamellar separation. Labradorite can aid in communicating with our highest self and with the creator. 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. Labradorite is named after the Canadian province of Labrador, the classic locality of this gemstone. Color: Dark grey to grey-black, with colorful iridescence. Labradorite was named for where it was discovered, Labrador, Canada. Help on Above. Labradorite is often heavily flawed with internal dark lines and streaks; stones that are clean of flaws are rare. Comments: Dual view of a cleavage fragment of labradorite showing the multi-colored labradorescence (schiller effect) and the same area viewed without the color. 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. Popularity of this gemstone is a proof of its effectiveness. 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. Labradorite belongs to plagioclase feldspars family. Labradorite Crystal gets its name from the town of Labrador, Canada, where the stone was discovered. } Although Labradorite is a selection of Anorthite, it is, in reality, a combination of Albite and Anorthite … Drag1 - Manipulate Crystal Labradorite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. function printSpecial() html += headTags[0].innerHTML; Español The geological type area for labradorite is Paul Island near the town of Nain in Labrador, Canada. I - Data Info Please use it when you are down or stressed out. São frequentes os cristais maclados. Albite is one member, containing sodium and no calcium. What makes it particularly attractive as a gemstone is that many specimens show a unique play of color. Labradorite has many meanings and effects of superior healing power. Density: 2.65 - 2.75. It is loved for its amazing play of colour (Labradorescence), which shows vivid flashes of gold, blue, green, orange, red sometimes violet. Streak nearly colorless. Refractive Index: 1.559 - 1.570. if (document.getElementById != null) Labradorite - Color, Facts, Power, Mythology, History And Myths. Labradorite is a feldspar mineral of the plagioclase series that is most often found in mafic igneous rocks such as basalt, gabbro, and norite. [5][6][7], The cause of this optical phenomenon is phase exsolution lamellar structure,[8] occurring in the Bøggild miscibility gap. Labradorite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. It is also found in anorthosite, an igneous rock in which labradorite can be the most abundant mineral. 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. Outcrops of basaltic lava flows are easily susceptible to mechanical and chemical weathering by penetration of groundwater along the polygonal joints (Fig. Common mineral associates in igneous rocks include olivine, pyroxenes, amphiboles and magnetite. 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. According to native Canadian tribal lore, Labradorite contains the Northern Lights, known as the Aurora Borealis. Rockhounds Discussion Group on Yahoo Groups Labradorite is a mineral that has the chemical formula of (NaCa) 2 Si 2 O 8. Labradorite belongs to plagioclase feldspars family. Name Origin: Named after its locality. Yellows, gold,reds, and purple are some of the other colors shown by specimens of labradorite. Labradorite Meaning - At Energy Muse, our crystals and stones such as the Labradorite have the ability to release mental, physical, and spiritual blockages. The specific gravity ranges from 2.68 to 2.72. © Dave Barthelmy, Mouse 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. Some gemstone varieties of labradorite exhibiting a high degree of labradorescence are called spectrolite. Striated - Parallel lines on crystal surface or cleavage face. may not work well with some computers. 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. Labradorite - Color, Facts, Power, Mythology, History And Myths. Also colorless, orange-red and brownish. P - Polyhedra On/Off 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. Labradorite is a plagioclase feldspar. Labradorite is a feldspar mineral with chemical formula (Ca,Na)(Al,Si)4O8. 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 is now a sought-after gemstone. Labradorite belongs to the triclinic crystal system. Mindat.org's Discussion Groups The other end member, Anorthite, contains calcium and no sodium. Properties of Labradorite. 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. Colour: Usually pale grey-blue to dark grey, green-brown to black. Its chemical formula is (Ca, Na)(Al, Si) 4 O 8, where Ca/(Ca + Na) (% anorthite) is between 30–50%. Uses of Labradorite . Dbl Clk - Start-Stop Rotation return; Labradorite is named after the Canadian province of Labrador, the classic locality of this gemstone. The specific gravity ranges from 2.68 to 2.72. General Labradorite Information : Chemical Formula: (Ca,Na)(Si,Al)4O8 : Composition: Molecular Weight = 271.81 gm Sodium 3.38 % Na 4.56 % Na 2 O Calcium 8.85 % Ca 12.38 % CaO Aluminum 15.88 % Al 30.01 % Al 2 O 3 Silicon 24.80 % Si 53.05 % SiO 2 Oxygen 47.09 % O _____ _____ 100.00 % 100.00 % = TOTAL OXIDE: Empirical Formula: Streak nearly colorless. Chemical Composition: (Ca,Na) (Si,Al) 4 O 8, Sodium present can be (30-50%) and Calcium present can be (70-50%). Labradorite | #Geology #GeologyPage #Minerals Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. Oct 10, 2014 - Chemical Formula: (Ca,Na)[Al(Al,Si)Si2O8] Locality: Labrador peninsula, Canada. It has an anorthite percentage (%An) of between 50 and 70. Spectrolite - Trade name for a Labradorite from Finland that shows the spectral colours especially effectively. var gAutoPrint = true; // Flag for whether or not to automatically call the print function { Chemical Formula: NaAlASi3O8 to CaAl2Si2O8 Sodium calcium aluminum silicate. You can find the explanation on the plagioclase feldspar page. And its chemical composition is as follows: (Na,Ca)(Al,Si) 4 O 8 with Na (30-50%) and Ca (70-50%). Chemical Formula: (Na,Ca)Al 1-2 Si 3-2 O 8. Keyboard It is noted for its beautiful play of color which flashes out over large areas of the grey-colored mineral. Warning: this large pop-up is very compute intensive and Labradorite is a feldspar mineral with chemical formula (Ca,Na)(Al,Si)4O8. Characterised … It is a variety of the well known mineral feldspar. This formula shows that there can be some variation in the relative proportions of calcium and sodium, and aluminum and silica, and still be classified as labradorite. Chemical geodynamics in a back arc region around the Sea of Japan: implications for the genesis of alkaline basalts in Japan, Korea, and China. 58 Carat Azure Flash Labradorite Pendant Natural Feldspar Mineral Freeform Spectrolite Crystal Polished Stone Specimen - Madagascar: Amazon.ca: Home & Kitchen printWin.print(); Chemical Formula: (Na,Ca)Al 1-2 Si 3-2 O 8. Labradorite is an intermediary member of this series. Andesine-Labradorite is a beautiful crystalline gem that is a combination of two feldspar varieties: andesine and labradorite. Labradorite is classified as a plagioclase feldspar with the chemical formula (Ca,Na)[Al(Al,Si)Si 2 O 8]. What makes it particularly attractive as a gemstone is that many specimens show a unique play of color. It has an anorthite percentage (%An) of between 50 and 70. It is noted for its beautiful play of color which flashes out over large areas of the grey-colored mineral. Labradorite ((Ca,Na)[Al Labradorite ((Ca, Na)(Al, Si) 4 O 8), a feldspar mineral, is an intermediate to calcic member of the plagioclase series. Plagioclase minerals frequently exhibit twinning and striations on cleavage faces. Labradorite PDF WM. printWin.document.write(html); _uacct = "UA-3067463-1"; Its beautiful schiller (or play of light) gives an outward indication of its ability to help us to look within and self-reflect. The cause of this optical phenomenon is lamellar structure caused by an exsolution process due to a miscibility gap. The stone helps you adopt a similar perspective on life. Crystal Structure: Triclinic; platy, prismatic. The streak is white, like most silicates. var printReadyElem = document.getElementById("printReady"); H - Help Screen } Ask-A-Mineralogist from the Mineralogical Society of America Name Origin: Named after its locality. Transparency: Transparent to opaque printWin.document.open(); M - Menu Colorless, Gray, Gray white, White, Light green. Ask about Labradorite here : 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. S - Stereo Pair on/off Labradorite displaying this effect is rare to find. Crystals are commonly twinned after Albite, Pericline, and Carlsbad laws. drag1 - LMB Manipulate Structure Its iridescent coloring ranges from yellow-orange to blue-green when moved around under light. 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: }, 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. Spectrolite is often cut as a lapidary cabochon, similar to plain labradorite, to enhance the effect and is used as a gemstone. 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. Scale: Picture size 3x3 cm. Define-se geralmente como tendo "%An" entre 50 e 70. Journal of Geophysical Research: Solid … You can find the explanation on the plagioclase feldspar page. Crystals are rare, to 2 cm; commonly massive, cleavable, or granular. urchinTracker(); Print or Cut-and-Paste your Labradorite Specimen Label here : 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. Labradorite ((Ca,Na)[Al (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. The phenomenal variety that shows labradorescence is the best-known variety, but rainbow moonstone, Oregon sunstone, and transparent yellow labradorite are also labradorite feldspars. A plagioclase feldspar with an albite : anorthite molar ratio ranging from 30 : 70 to 50 : 50. Mouse alert("Could not find the printReady section in the HTML"); 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 . Labradorite is a mineral in the plagioclase series, and it shares many of the properties of plagioclase minerals. 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. Chemical Formula: (Ca,Na)[Al(Al,Si)Si 2 O 8] Locality: Labrador peninsula, Canada. O indíce de refracção varia de 1.555 a 1.575. Chemical Formula (Ca,Na)(Al,Si) Structure Triclinic. 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. [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 is a feldspar mineral with the chemical formula (Ca, Na)(Al, Si)4O8. Drag2 - Resize An intermediate member of the Albite-Anorthite Series. Keyboard 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. } Name From the occurrence at Fo A - Atoms On/Off Some stones have a greater labradorescence effect then others, and a greater play of color increases the value of the Labradorite. Labradorite belongs to the Plagioclase Feldspar group, an isomorphous solid solution series. 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. A variety of Albite A plagioclase feldspar with an albite : anorthite molar ratio ranging from 50 : 50 to 70 : 30. It can be seen as perfect cleavages and uneven to conchoidal fractures as physical properties. Crystal System: Triclinic. Labradorite PDF WM. 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. Originally described from Marmato Mine, Marmato, Cauca, Chocó Department, Colombia. Crystalline - Coarse - Occurs as well-formed coarse sized crystals. alert("Sorry, the print ready feature is only available in modern browsers.