andalusite
/ˌændəˈluːsaɪt/
noun
- A mineral that is a silicate of aluminum, often found in metamorphic rocks and used as a gemstone or in ceramics.
- Andalusite is sometimes called 'chiastolite' when it has a cross-shaped pattern.
- The jeweler showed me a beautiful green andalusite ring.
- Miners discovered a large deposit of andalusite in the mountains.