mineral
Honey calcite (orange/yellow calcite)
Calcite — calcium carbonate, CaCO₃
AI-generated identification · may be incorrectTypically pale yellow to honey-orange, translucent to opaque, with a vitreous-to-pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, specific gravity about 2.71. The irregular piece appears naturally fractured or roughly shaped, though image-based identification is provisional.
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Physical properties
Typically pale yellow to honey-orange, translucent to opaque, with a vitreous-to-pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, specific gravity about 2.71. The irregular piece appears naturally fractured or roughly shaped, though image-based identification is provisional.
Formation & geological history
Forms widely in limestone, marble, hydrothermal veins, cavities, and sedimentary deposits through precipitation from carbonate-rich fluids; specimens range from ancient to modern geological ages. Common localities include Mexico, Brazil, Iceland, and the United States.
Uses & applications
Used in cement, lime, aggregate, soil treatment, and chemical industries; attractive transparent pieces are collected or carved, but it is generally too soft for durable jewelry.
Geological facts
Calcite effervesces strongly in dilute hydrochloric acid or vinegar, though vinegar may react slowly; it shows double refraction when clear. Yellow coloration commonly reflects iron or other trace impurities.
Field identification & locations
Identify by its softness, rhombohedral cleavage, and acid reaction; distinguish from yellow quartz, which is harder and lacks cleavage. Common rough specimens typically sell for $5-$25, while larger, clear, well-formed pieces may bring $30-$150+.
