Descloizite
Chemical Formula	(Pb,Zn)2VO4OH
Species	Silicates
Crystal System	Orthorhombic
Mohs Scale	3
Specific Gravity	6.1-6.2
Color	Brownish red, red-orange, reddish to blackish brown, nearly black
Streak	Orange to brownish red
Luster	Sub-Vitreous, Resinous, Waxy, Greasy
Refractive Index	n = 2.185 n = 2.265 n = 2.350
Diaphaneity	Transparent, Translucent
Cleavage	None Observed
Fracture	Irregular/Uneven, Sub-Conchoidal
Crystal Habit：Zoned tabular crystals common, encrustations and plumose aggregates
Geological Setting：Secondary mineral in oxidized zone of vanadium bearing base metal deposits.