cobaltite
/ˈkoʊbɔːltaɪt/
noun
- A silver-white to gray mineral that is a sulfide of cobalt and arsenic, an important ore of cobalt.
- The jeweler used a piece of polished cobaltite as a decorative stone.
- Miners extracted cobaltite from the old mine in Sweden.
- Cobaltite is often found alongside other valuable metal ores.