Sphalerite
Chemical Formula	(Zn,Fe)S
Species	Sulfides
Crystal System	Isometric
Mohs Scale	3-4
Specific Gravity	3.9-4.2
Color	Brown, yellow, red, green, black.
Streak	brownish white, pale yellow
Luster	Adamantine, Resinous
Refractive Index	n = 2.369
Diaphaneity	Transparent, Translucent
Cleavage	PerfectPerfect
Fracture	Conchoidal
Crystal Habit：Euhedral crystals – occurs as well-formed crystals showing good external form. Granular – generally occurs as anhedral to subhedral crystals in matrix.