mineral
Calcite Cluster
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectMohs hardness of 3; exhibits rhombohedral crystal habit, perfect cleavage, and vitreous to earthy luster; typically white or clear but can display various pastel colors.
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Physical properties
Mohs hardness of 3; exhibits rhombohedral crystal habit, perfect cleavage, and vitreous to earthy luster; typically white or clear but can display various pastel colors.
Formation & geological history
Formed via precipitation from calcium-rich aqueous solutions in sedimentary environments, hydrothermal veins, and cavern systems.
Uses & applications
Extensively used in construction as limestone or marble, manufacturing of cement, agriculture for soil neutralization, and as a popular mineral specimen for collectors.
Geological facts
Calcite exhibits strong optical birefringence, doubling any image viewed through clear specimens (Iceland spar), and strongly effervesces when exposed to weak acids.
Field identification & locations
Easily identified by its characteristic rhombohedral cleavage and soft 3 Mohs hardness, reacting aggressively with dilute hydrochloric acid.
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