kyanite
/ˈkaɪənaɪt/
noun
- A blue or greenish mineral used in making heat-resistant materials like ceramics and spark plugs.
- Miners extracted kyanite from the quarry for industrial use.
- The jeweler showed us a pendant made from polished kyanite.
- Kyanite is often used in the production of refractory bricks for furnaces.
Synonyms