Andalusite - Wikipedia
Andalusite is an aluminium nesosilicate mineral with the chemical formula Al 2 SiO 5. This mineral was called andalousite by Delamétherie, [3] who thought it came from Andalusia, Spain.
Andalusite Value, Price, and Jewelry Information - Gem Society
Andalusite is eponymous with Andalusia, a region in southern Spain. This gem received this name from the French mineralogist Jean-Claude Delamétherie in 1798, after its supposed source. However, the material he examined came from Castile-La Mancha, a …
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.
Andalusite – Mineral Properties, Photos and Occurrence
2021年6月4日 · Andalusite is a typical mineral of aluminum rich rocks, where it forms under low pressure and low to high temperature conditions. Source rocks are typically represented by various schists or some granites and pegmatites. Andalusite is also common in some types of contact metamorphic rocks.
Andalusite: The mineral andalusite information and pictures
Detailed description, properties, and locality information guide about the mineral andalusite and chiastolite.
Andalusite | Properties, Formation, Occurrence and Uses
2023年8月25日 · 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 Gem Guide and Properties Chart - Gemstones.com
This Andalusite gemstone guide lists qualities of the Andalusite gem type, including stone colors, common names, meanings, gemstone hardness and more.
Andalusite Stone: Meanings, Properties, Facts, And More
Andalusite is a gemstone, renowned for its changing hues of yellow, green and brown, and originating from the Andalusia region in southern Spain. It’s found all around the world, including in Sri Lanka and Czech Republic. Baguette cabochon and sugarloaf cabochon cuts are popular for this mineral as it showcases its color movement.
Andalusite Information - Fall colors play on this rare gemstone - GemSelect
Andalusite is a little-known gemstone which usually occurs in earthy or fall colors such as orange, yellow, brown, green and gold. It is an attractive gemstone with an unusual play of color where the color switches two or three times as it is turned.
Andalusite | Metamorphic, Heat-Resistant, Silicate | Britannica
andalusite, (Al 2 SiO 5), 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 …
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