The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bornite
    n 1: a mineral consisting of sulfides of copper and iron that is
         found in copper deposits [syn: bornite, peacock ore]