The Collaborative International Dictionary
erubescite
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.
Wiktionary
erubescite
n. (context mineral English) bornite.