Chalcopyrite Chalcopyrite Chalcopyrite ( ) is a copper iron sulfide mineral that crystallizes in the tetragonal system. It has the chemical formula CuFeS. 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. Associated copper minerals include the sulfides bornite (CuFeS), chalcocite (CuS), covellite (CuS), digenite (CuS); carbonates such as malachite and azurite, and rarely oxides such as cuprite (CuO). Chalcopyrite is rarely found in association with native copper. Natural
Rampura Agucha to have occurred approximately 1 billion years ago. There are a few sulphides and oxide minerals that form within the ore that are a particular interest, the major one being sphalerite. Galena, pyrite, pyrrhotite, and marcasite commonly occur with the sphalerite along with some minor arsenopyrite and chalcopyrite. Gahnite and rutile are the most common oxide minerals that form within the ore, with rutile being the most abundant. Graphite is also a mineral that is commonly found within the ore and surrounding rock. Extracted deposits through drilling, blasting, and underground mining methods are loaded and taken to be processed while