10 of 10 Items
10 of 10 Items
Andalusite is a lesser-known gemstone. Discovered in Andalusia, Spain, the gem was named after this locality. It's a polymorph of two gem varieties; Sillimanite and the hugely popular Kyanite. This means they're identical in chemical composition but differ in crystal structure. Andalusite is strongly pleochroic, showing different colors when viewed at different angles.