Where Is the Gemstone Andalusite from?

Andalusite is a transparent to translucent gem that derives its name from Andalusia in Spain where it was first discovered. The gem is actually a polymorph of two gem varieties: Sillimanite and the hugely popular Kyanite. This means they are identical in chemical composition but differ in crystal structure.

Is andalusite a rare stone?

Although Andalusite as a mineral is not uncommon, the transparent variety used as a gem is very rare. Another important form of Andalusite that is entirely different is the mostly opaque Chiastolite variety, which is known for its unique cross-shaped design within the body of a crystal.

Where is andalusite found?

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.