mineral
Green calcite (rough specimen)
Calcite, CaCO₃
AI-generated identification · may be incorrectPale green, translucent, vitreous to pearly; Mohs hardness 3, trigonal crystal system, and perfect rhombohedral cleavage. The irregular shape and cloudy color are consistent with rough calcite, though the photo alone cannot confirm the identification.
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Physical properties
Pale green, translucent, vitreous to pearly; Mohs hardness 3, trigonal crystal system, and perfect rhombohedral cleavage. The irregular shape and cloudy color are consistent with rough calcite, though the photo alone cannot confirm the identification.
Formation & geological history
Forms in sedimentary and hydrothermal environments, commonly from calcium-rich fluids; calcite occurs in rocks of many geological ages.
Uses & applications
Used in cement and lime production, as a flux and soil treatment, and as a decorative or collector mineral; soft green pieces are sometimes sold as ornamental stone.
Geological facts
Calcite effervesces in dilute acid and is readily scratched by a steel blade. Green color may result from trace impurities or inclusions.
Field identification & locations
Look for cleavage faces, low hardness, and a vigorous fizz with dilute hydrochloric acid; common worldwide, including Mexico, China, and the United States.
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