RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY
Chalcopyrite. Chalcopyrite, copper iron sulfide (CuFeS2}, is one of the most widespread and important ores of copper. It occurs both as disseminated grains in a host rock, and also in vein-type deposits along with pyrite, galena, sphalerite and other sulfide minerals. Chalcopyrite has a golden yellow colour, but the surface tarnishes rapidly upon exposure to air leaving a characteristic brightly colored iridescent film.
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