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bornite
(redirected from Erubescite)

    Also found in: Dictionary/thesaurus, Wikipedia 0.03 sec.

bornite

Common copper-ore mineral, copper and iron sulfide (Cu5FeS4). Typical occurrences are found in Mount Lyell, Tasmania; Chile; Peru; and Butte, Mont. Bornite may form isometric crystals but occurs most commonly as irregular masses. Under appropriate geologic conditions, it alters to chalcocite and other copper minerals.

bornite [′bȯr‚nīt]
(mineralogy)
Cu5FeS4A primary mineral in many copper ore deposits; specific gravity 5.07; the metallic and brassy color of a fresh surface rapidly tarnishes upon exposure to air to an iridescent purple.


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