mineral
Calcite
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness of 3 on Mohs scale, typically white or colorless, vitreous to earthy luster, rhombohedral crystal structure, perfect cleavage in three directions, specific gravity of 2.71.
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Physical properties
Hardness of 3 on Mohs scale, typically white or colorless, vitreous to earthy luster, rhombohedral crystal structure, perfect cleavage in three directions, specific gravity of 2.71.
Formation & geological history
Forms primarily through the precipitation of calcium carbonate from marine waters or hydrothermal solutions, spanning various geological ages.
Uses & applications
Widely used in construction (limestone/cement), agriculture, manufacturing of paper and plastics, and as optical materials or collector specimens.
Geological facts
Calcite is the primary constituent of limestone and marble and exhibits strong double refraction (birefringence) when clear.
Field identification & locations
Easily identified in the field by its characteristic rhombohedral cleavage and strong effervescence when exposed to dilute hydrochloric acid.
