mineral
Tumbled green calcite
Calcite, CaCO₃
AI-generated identification · may be incorrectPale mint-green, translucent to opaque, with a vitreous to pearly luster and typically rhombohedral cleavage; Mohs hardness 3. The rounded shape and polish are from tumbling, not natural crystal form.
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Physical properties
Pale mint-green, translucent to opaque, with a vitreous to pearly luster and typically rhombohedral cleavage; Mohs hardness 3. The rounded shape and polish are from tumbling, not natural crystal form.
Formation & geological history
Calcite forms in many geological settings, including limestone and hydrothermal veins; green color commonly comes from trace impurities. Calcite deposits range from ancient to actively forming.
Uses & applications
Used as a decorative and collector stone; calcite also has major industrial uses in cement, lime, and construction aggregate.
Geological facts
Calcite effervesces in dilute acid and is readily scratched by a steel knife. Its softness makes it less suitable for everyday jewelry.
Field identification & locations
Likely identified by its pale green color, softness, and cleavage, though appearance alone cannot confirm the mineral. Calcite occurs worldwide; small tumbled pieces commonly sell for about $2–$10 USD.
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