mineral
Calcite
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness: 3 on Mohs scale, Color: Yellow, white, or colorless, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Perfect rhombohedral in three directions, Specific gravity: 2.71
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Physical properties
Hardness: 3 on Mohs scale, Color: Yellow, white, or colorless, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Perfect rhombohedral in three directions, Specific gravity: 2.71
Formation & geological history
Formed in sedimentary environments through the precipitation of calcium carbonate from water, as well as in hydrothermal veins and metamorphic marbles.
Uses & applications
Used in construction (as limestone and marble), manufacturing of cement, agriculture to neutralize acidic soils, and in optical devices.
Geological facts
Calcite exhibits strong double refraction (birefringence), meaning light passing through it is split into two rays, creating a double image.
Field identification & locations
Easily identified by its characteristic rhombohedral cleavage and effervescence (bubbling) when tested with dilute hydrochloric acid. Found worldwide.
