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 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 …

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 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.

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.

Detailed description, properties, and locality information guide about the mineral andalusite and chiastolite.

This Andalusite gemstone guide lists qualities of the Andalusite gem type, including stone colors, common names, meanings, gemstone hardness and more.

Andalusite is an attractive and unusual gemstone, first discovered in Andalusia, Southern Spain, after which it is named. It has some similarities with the more expensive alexandrite, as both are strongly pleochroic.

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.

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.