noun. a yellow copper ore (CuFeS2) made up of copper and iron sulfide.
1. Noun, singular or mass Chunks of "fool's gold," naturally occurring minerals such as iron pyrite, chalcopyrite or bismutite, also can deceive the unwary. 2. Adjective The most abundant minerals are chalcopyrite, bornite, enargit, tetrahedrite, sphalerite and galena.
