CaCO3Trigonal
Calcite
CaCO3
CarbonatesChemical FormulaCaCO3
Crystal SystemTrigonal
Mohs Hardness3
Specific Gravity2.71
ColorColorless, white, yellow, blue, green
LusterVitreous to resinous
StreakWhite
CleavageThree directions
FractureConchoidal
Occurrence
Major component of limestone and marble. Found in sedimentary rocks worldwide.