Carnotite
Chemical Formula	K2(UO2)2(VO4)2·3H2O
Species	Phosphates
Crystal System	Monoclinic
Mohs Scale	2
Specific Gravity	4.70
Color	Bright yellow to lemon-yellow, may be greenish yellow.
Streak	yellow
Luster	Sub-Vitreous, Resinous, Waxy, Silky, Dull, Earthy
Refractive Index	n = 1.750 n = 1.925 n = 1.950
Diaphaneity	Translucent
Cleavage	Perfecton , perfect, micaceous
Fracture	Micaceous
Crystal Habit：Crusts, earthy masses, foliated and granular aggregates.
Geological Setting：Colorado Plateau type uranium deposits, near playas.