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 that resemble a peacock's feathers. Bornite typically forms in hydrothermal veins and is commonly found in copper deposits, making it an important ore for copper extraction. This mineral has a metallic luster and can appear in shades of purple, blue, and gold. Bornite is primarily mined for its copper content, which is essential for various applications, including electrical wiring and plumbing. Its unique appearance also makes it popular among collectors and in decorative items.