The difference between Bornite and Peacock copper
When used as nouns, bornite means a reddish mineral that tarnishes on exposure to air, whereas peacock copper means bornite.
check bellow for the other definitions of Bornite and Peacock copper
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Bornite as a noun (mineral):
A reddish mineral that tarnishes on exposure to air; it is a mixed sulfide of iron and copper with the chemical formula Cu5FeS and is an important ore of copper.
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Peacock copper as a noun (informal):
Bornite.