mineral
Tumbled honey-colored calcite
Calcite (calcium carbonate, CaCO₃)
AI-generated identification · may be incorrectTypically Mohs hardness 3, white to honey-yellow color, vitreous to pearly luster, and rhombohedral cleavage; the specimen appears polished or naturally smoothed and may show translucent banding. Crystal structure is trigonal.
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Physical properties
Typically Mohs hardness 3, white to honey-yellow color, vitreous to pearly luster, and rhombohedral cleavage; the specimen appears polished or naturally smoothed and may show translucent banding. Crystal structure is trigonal.
Formation & geological history
Calcite forms in limestones, caves, hydrothermal veins, and sedimentary cavities through precipitation from carbonate-rich fluids; its age can range from recent cave deposits to rocks hundreds of millions of years old.
Uses & applications
Used in cement, lime, aggregate, soil treatment, and chemical manufacturing; attractive honey calcite is sold as a lapidary, décor, or metaphysical specimen rather than fine jewelry.
Geological facts
Calcite effervesces strongly with dilute hydrochloric acid and may display double refraction through clear areas. Its color commonly comes from iron, organic material, or other trace impurities.
Field identification & locations
Identify it by its softness, rhombohedral cleavage, and acid reaction; it is commonly found worldwide in limestone regions, especially Mexico, the United States, Brazil, and Europe. Avoid vinegar as a definitive test because the reaction may be weak.
