A dark gray or black mineral consisting of copper sulfide (Cu₂S), an important ore of copper and one of the most economically valuable copper minerals.
From Greek 'chalkos' (copper) plus '-cite,' the mineral suffix derived from Greek 'kite' meaning rock. The name precisely describes this mineral's copper content and crystalline structure.
Chalcocite is so copper-rich that it's one of the best ores to mine—you get more copper per pound of rock than from most other sources. It often forms in the enriched zones beneath weathered copper deposits, making it a prospector's dream.
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