Bornite is a copper iron sulfide mineral with the chemical formula Cu5FeS4. It is often referred to as "peacock ore" due to its iridescent colors, which can range from purple to blue and gold. This mineral is primarily found in hydrothermal veins and is an important source of copper. Bornite typically forms in high-temperature environments and is associated with other minerals like chalcopyrite and pyrite. It is commonly mined for its copper content and can be found in various locations worldwide, including regions in South America and North America.