bornite
noun
born·ite ˈbȯr-ˌnīt 
: a brittle metallic-looking mineral that consists of a sulfide of copper and iron and is a valuable copper ore
Example Sentences
Recent Examples on the Web These include azurite, malachite (both copper carbonate hydroxide minerals), chalcocite (a copper-sulfide), acanthite (a copper-silver sulfide), chalcopyrite and bornite. 
David Bressan, Forbes, 4 July 2021
David Bressan, Forbes, 4 July 2021 Word History
Etymology
German Bornit, from Ignaz von Born †1791 Austrian mineralogist
First Known Use
1811, in the meaning defined above