Bornite
From Wikipedia, the free encyclopedia.

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.

The original article can be found at: http://en.wikipedia.org/wiki/Bornite.
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