Wurtzite
Chemical Formula	(Zn,Fe)S
Species	Sulfides
Crystal System	Hexagonal
Mohs Scale	3-4
Specific Gravity	4.09-4.10
Color	Brownish black, Orange brown, Reddish brown, Black.
Streak	light brown
Luster	Resinous
Refractive Index	n = 2.356 n = 2.378
Diaphaneity	Translucent
Cleavage	Very GoodVery good and easy on .
Fracture	Irregular/Uneven
Crystal Habit：Radial clusters and colloform crusts and masses. Also as tabular crystals
Geological Setting：Found in hydrothermal veins rich in Zn and as concretions in sedimentary rocks.