CuFeS2Tetragonal
Chalcopyrite
CuFeS2
SulfidesChemical FormulaCuFeS2
Crystal SystemTetragonal
Mohs Hardness3.5
Specific Gravity4.28
ColorBrass yellow, often tarnished
LusterMetallic
StreakGreenish black
CleavageIndistinct
FractureUneven
Occurrence
Most common copper mineral. Found in igneous and metamorphic rocks.