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 found in various locations worldwide, including Chile, Canada, and the United States. It is primarily mined for its copper content, which is essential for electrical wiring and various industrial applications.