-ˈpīˌrīt noun
( -s )
Etymology: New Latin chalcopyrites, from chalc- + Latin pyrites sulfide of metallic appearance — more at pyrites
: a bright brass-yellow mineral CuFeS 2 consisting of copper-iron sulfide that crystallizes in the tetragonal system but usually occurs massive and that is one of the most important ores of copper (hardness 3.5-4, specific gravity 4.1-4.3)