Calcite
Chemical compound
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate. It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scratch hardness... Wikipedia
Formula: CaCO₃
Crystal system: Trigonal
Solubility: Soluble in dilute acids
Density: 2.711 g/cm3
Birefringence: δ = 0.154–0.174
Category: Carbonate mineral
Cleavage: Perfect on, three directions with angle of 74° 55'
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