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Chalcopyrite is a copper iron sulfide mineral with the chemical formula CuFeS2. It has a golden yellow color and a metallic luster, and it is often found in association with other sulfide minerals such as pyrite, sphalerite, and galena.
Chalcopyrite is an important copper ore mineral, and it is one of the most abundant sulfide minerals in the Earth's crust. It is also a significant source of other metals such as gold, silver, and molybdenum, which can be extracted from chalcopyrite ores using various methods such as smelting, leaching, and flotation.
In terms of its physical properties, chalcopyrite has a Mohs hardness of 3.5-4, a specific gravity of 4.1-4.3, and a streak that ranges from greenish-black to brownish-black. It is commonly found in hydrothermal veins, as well as in porphyry copper deposits and sedimentary exhalative deposits on the seafloor.

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