The Bornite reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Bornite

Bornite is a sulfid mineral with chemical composition Cu₅FeS₄ that crystallizes in the cubic system. It has a bronze brown colour and is found mostly in pegmatites.

It is important for its copper content of about 63 percent by weight and is found especially in Mexico and Montana, USA.

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