Kalkopirit, also known as 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. Kalkopirit 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. Kalkopirit is primarily mined for its copper content, which is essential for various applications, including electrical wiring and plumbing. Its extraction and processing are vital to the global copper supply chain.