Powellite
Chemical Formula	CaMoO4
Species	Molybdates & Tungstates
Crystal System	Tetragonal
Mohs Scale	3-4
Specific Gravity	4.255
Color	Yellow, brown, blue, black
Streak	light yellow
Luster	Sub-Adamantine, Resinous, Pearly
Refractive Index	n = 1.974 n = 1.984
Diaphaneity	Transparent, Translucent
Cleavage	Poor/IndistinctIndistinct on and .
Fracture	Irregular/Uneven
Crystal Habit：Massive to Crystalline
Geological Setting：Oxidation zone of hydrothermal deposits