What is "bornite"

Bornite \Bor"nite\, n. [Named after Von Born, a mineralogist.] (Min.) A valuable ore of copper, containing copper, iron, and sulphur; -- also called purple copper ore (or erubescite), in allusion to the colors shown upon the slightly tarnished surface.

n. (context mineral English) A reddish mineral that tarnishes on exposure to air; it is a mixed sulfide of iron and copper with the chemical formula copper₅ironsulfur and is an important ore of copper.

n. a mineral consisting of sulfides of copper and iron that is found in copper deposits [syn: peacock ore]

Bornite, also known as peacock ore, is a sulfide mineral with chemical composition Cu FeS that crystallizes in the orthorhombic system (pseudo-cubic).