cobaltine
/ˈkoʊbɔːltiːn/
noun
- A rare grayish-white mineral that is a sulfide of cobalt and arsenic, often found with other cobalt ores.
- The geologist identified a sample of cobaltine in the rock collection.
- Cobaltine is sometimes mined as a source of cobalt.
- The museum displayed a beautiful crystal of cobaltine from Norway.