mineral
Tumbled orange calcite
Calcite (CaCO₃)
AI-generated identification · may be incorrectSmooth, polished, translucent-to-opaque honey-orange stone with a vitreous to waxy luster and cloudy white patches. Calcite has Mohs hardness 3, trigonal crystal structure, and perfect rhombohedral cleavage; the image alone cannot confirm the identification.
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Physical properties
Smooth, polished, translucent-to-opaque honey-orange stone with a vitreous to waxy luster and cloudy white patches. Calcite has Mohs hardness 3, trigonal crystal structure, and perfect rhombohedral cleavage; the image alone cannot confirm the identification.
Formation & geological history
Likely formed as a sedimentary or hydrothermal calcite deposit, then cut and tumbled. Calcite occurs in rocks of many ages and settings; the specimen’s age and source cannot be determined from the photo.
Uses & applications
Decorative and collectible stone; calcite is also used in cement, lime, and industrial fillers.
Geological facts
Calcite effervesces in dilute acid and is readily scratched by a copper coin or steel blade. Orange color commonly comes from trace impurities.
Field identification & locations
Look for low hardness, rhombohedral cleavage, and strong fizz with dilute acid; orange calcite is found in many countries, including Mexico. The pictured piece appears tumbled, so locality is not identifiable.
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