noun
cobaltite
A mineral composed of cobalt, arsenic, and sulfur. Used in mineralogy and geology contexts.
輝コバルト鉱はコバルトの重要な鉱石鉱物の一つです。
Cobaltite is one of the important ore minerals of cobalt.
The name derives from the mineral's composition (cobalt) and its metallic luster (輝, 'brightness'). The exact historical derivation is uncertain.