Tags: Chemical Substance, Mineral.

Chalcopyrite (/ˌkælkɵˈpaɪraɪt/ KAL-ko-PY-ryt) is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has the chemical composition CuFeS2. It has a brassy to golden yellow color and a hardness of 3.5 to 4 on the Mohs scale. Its streak is diagnostic as green tinged black.On exposure to air chalcopyrite oxidises to a variety of oxides hydroxides and sulfates.

Chalcopyrite-Quartz-237645.jpg

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