Cu3(CO3)2(OH)2Monoclinic
Azurite
Cu3(CO3)2(OH)2
CarbonatesChemical FormulaCu3(CO3)2(OH)2
Crystal SystemMonoclinic
Mohs Hardness3.5
Specific Gravity3.77
ColorDeep blue
LusterVitreous
StreakLight blue
CleavageTwo directions
FractureConchoidal
Occurrence
Found in oxidized copper deposits. Often found with malachite. Used as blue pigment.