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  • Andalusite - Wikipedia
    Andalusite is a common metamorphic mineral which forms under low pressure and low to high temperatures The minerals kyanite and sillimanite are polymorphs of andalusite, each occurring under different temperature-pressure regimes and are therefore rarely found together in the same rock
  • Andalusite: Mineral information, data and localities.
    Andalusite was first analysed by Werner on specimens coming from Spain Both Werner and Delamétherie believed that the specimens came from Andalusia, which is why the latter named it "andalusite"
  • What is Andalusite? What is Chiastolite? - Geology. com
    Andalusite is an aluminosilicate mineral with a chemical composition of Al 2 SiO 5 It forms at low to medium metamorphic temperatures and pressures where argillaceous rocks (such as shale) are exposed to regional and contact metamorphism
  • What Is Andalusite? Mineral, Gem, and Industrial Uses
    Andalusite is an aluminum silicate mineral valued as a gemstone and industrial material, known for its pleochroism and heat-resistant properties
  • Andalusite | Properties, Formation, Occurrence and Uses
    Definition: Andalusite is a naturally occurring aluminum silicate mineral with the chemical formula Al2SiO5 It crystallizes in the orthorhombic crystal system, forming prismatic crystals that often display a distinctive cross-shaped pattern when viewed in cross-section
  • Andalusite - ALEX STREKEISEN
    Andalusite is a common regional metamorphic mineral which forms under low pressure and low to high temperatures The minerals kyanite and sillimanite are polymorphs of andalusite, each occurring under different temperature-pressure regimes and are therefore rarely found together in the same rock
  • Andalusite | Metamorphic, Heat-Resistant, Silicate | Britannica
    Andalusite, (Al2SiO5), aluminum silicate mineral that occurs in relatively small amounts in various metamorphic rocks, particularly in altered sediments It is found in commercial quantities in the Inyo Mountains, Mono county, Calif , in the United States; in Kazakhstan; and in South Africa
  • Andalusite - Imerys
    Andalusite is a naturally occurring alumino-silicate mineral commonly found in metamorphic rocks It is a high-purity mineral composed of prismatic and anhydrous crystals Containing up to 60% alumina, andalusite transforms into mullite at low temperatures of between 1,200°C and 1,550°C
  • Andalusite - The Poor Mans Alexandrite | Crystal Almanac
    Andalusite is an aluminum silicate mineral (Al₂SiO₅) and one of three polymorphs of that composition, sharing its chemistry with kyanite and sillimanite Andalusite belongs to the Al₂SiO₅ polymorph group alongside kyanite and sillimanite
  • Andalusite - University of North Dakota
    Andalusite is a low pressure metamorphic mineral and is a polymorph of kyanite and sillimanite Its formula is Al 2 SiO 5 Keys to identification are high relief, low birefringence and parallel extinction · Color - generally colorless, rarely reddish Often cloudy due to inclusions





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