Learn about Enargite
sharp metallic prisms, gunmetal color with iridescent tarnish; rare top specimens on quartz or pyrite from classic mines like Butte, Bingham.East Colusa Mine
East Colusa Mine, USA — official type locality of colusite Cu13VAs3S16, with covellite iridescence, enargite, and quartz; a key Butte copper locality for colle…
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