mineral
Calcite Crystal Cluster
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectMohs hardness of 3, vitreous to earthy luster, transparent to opaque with rhombohedral cleavage, and a specific gravity of 2.71.
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Physical properties
Mohs hardness of 3, vitreous to earthy luster, transparent to opaque with rhombohedral cleavage, and a specific gravity of 2.71.
Formation & geological history
Formed through the precipitation of calcium carbonate from aqueous solutions in sedimentary environments, hydrothermal veins, and caves.
Uses & applications
Widely used in the manufacturing of cement, construction aggregates, optical devices, and as a popular specimen for mineral collectors.
Geological facts
Calcite exhibits strong optical birefringence, doubling any image viewed through clear crystal specimens, and reacts vigorously with dilute hydrochloric acid.
Field identification & locations
Identified easily by its characteristic rhombohedral cleavage and effervescence in acid; commonly found globally in limestone and marble deposits.
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