Roger Weller, geology instructor
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Chalcopyrite is a copper and iron sulfide. The name chalcopyrite says it all:
"chalco" is copper and "pyrite" is iron sulfide. Chalcopyrite is also known as yellow
copper ore. Chalcopyrite can be distinguished from pyrite, which it closely
resembles in massive form, by its much more intense yellow color. Pyrite is often
described as a pale brassy yellow, while chalcopyrite is a strong brassy yellow.
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