Chalcopyrite is a mineral composed of copper, iron, and sulfur, with the chemical formula CuFeS2. It is the most important copper ore and is typically found in igneous and metamorphic rocks. Chalcopyrite has a brass-yellow color and a metallic luster, making it easily recognizable. This mineral is often associated with other sulfide minerals, such as pyrite and bornite. Chalcopyrite can be processed to extract copper, which is widely used in electrical wiring, plumbing, and various alloys. Its presence in ore deposits makes it a key resource in the mining industry.