Chalcopyrite
Chemical Formula	CuFeS2
Species	Sulfides
Crystal System	Tetragonal
Mohs Scale	3-4
Specific Gravity	4.1-4.3
Color	Brass yellow, may have iridescent purplish tarnish.
Streak	Greenish black
Luster	Metallic
Refractive Index	不透明
Diaphaneity	Opaque
Cleavage	Poor/IndistinctIndistinct on , sometimes distinct.
Fracture	Irregular/Uneven
Crystal Habit：Predominantly the disphenoid and resembles a tetrahedron, commonly massive, and sometimes botryoidal.
Geological Setting：It is the most abundant copper-bearing mineral and is widespread. It is a primary mineral in hydrothermal veins, disseminations and massive replacements; the principal copper mineral of porphyry-copper deposits.