Calcite is the name give to a family of chemically related (CaCO3) stones. Calcite comes in numerous colours; clear, blue, green, orange and red. It can have a Vitreous, Sub-Vitreous, Resinous, Waxy, and Pearly lustre a hardness of 3 on the Mohs Scale. Specific Gravity of 2.7102 and forms according to a hexagonal crystal system. Mangano Calcite is a relatively rare variety.
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