Bornite

1. n. 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.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.