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 Chalcopyrite is commonly called Peacock Ore, or peacock pyrite because of it's brassy green and purple coloring. It is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has the chemical composition CuFeS2. Even though it feels heavy and hard this mineral is actually quite fragile. Found often as the primary mineral in igneous rocks, it could be found in hydrothermal veins, and sometimes in limestone or sediments. Chalcopyrite has hardness of 3.5 to 4 on the Mohs scale. On exposure to air, chalcopyrite oxidises to a variety of oxides, hydroxides and sulfates. This shiny iridescent mineral is an important ore of the copper industry (sources: Wikipedia & Northwest Nature Shop)  Return to List Back to Michael's Hobbies page Back to Michael Marcotte's HomePage 
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