Bornite

Bornite is an ore of copper. It is made of copper and iron sulfides. It has the chemical formula . It contains more copper and less iron than chalcopyrite.

It looks like chalcopyrite. The two are both sometimes called "peacock color" or "peacock ore" because of their colourful tarnish.

 Reources 

Category:Copper minerals
Category:Iron minerals
Category:Sulfide minerals
Category:Ores