Bornite Bornite Bornite, also known as peacock ore, is a sulfide mineral with chemical composition CuFeS that crystallizes in the orthorhombic system (pseudo-cubic). Bornite has a brown to copper-red color on fresh surfaces that tarnishes to various iridescent shades of blue to purple in places. Its striking iridescence gives it the nickname "peacock copper" or "peacock ore". Bornite is an important copper ore mineral and occurs widely in porphyry copper deposits along with the more common chalcopyrite. Chalcopyrite and bornite are both typically replaced by chalcocite and covellite in the supergene enrichment zone of copper deposits. Bornite is also found as
Ore Mountains animals that have been found at higher altitudes of the Ore mountains are otherwise only known from more distant places in the Sudeten mountains or the Alps. After conditions improved, once displaced species such as Eagle owls and Black storks have returned in the early 21st century. The German part of the Ore Mountains is one of the major business locations in Saxony. The region has a high density of industrial operations. Since 2000, the number of industrial workers has risen against the Germany-wide trend by about 20 percent. Typical of the Ore Mountains are mainly small, often owner-managed, businesses.