mineral
Honey calcite (likely cleavage fragment)
Calcite, calcium carbonate (CaCO₃)
AI-generated identification · may be incorrectPale honey-yellow, translucent, vitreous to pearly luster with prominent rhombohedral cleavage and stepped surfaces; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The blocky form and cleavage strongly favor calcite over quartz.
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Physical properties
Pale honey-yellow, translucent, vitreous to pearly luster with prominent rhombohedral cleavage and stepped surfaces; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The blocky form and cleavage strongly favor calcite over quartz.
Formation & geological history
Forms in limestone, hydrothermal veins, caves, and evaporite-associated deposits through precipitation from carbonate-rich fluids; specimens may range from ancient sedimentary settings to young cavity growth. Exact age and locality cannot be determined from the image.
Uses & applications
Used in cement, lime, aggregate, soil treatment, and chemical manufacture; transparent honey calcite is also sold as a collector mineral or ornamental stone, though it is too soft for most jewelry.
Geological facts
Calcite effervesces readily in dilute hydrochloric acid and shows strong birefringence, producing a doubled image when placed over text. Color commonly comes from iron or other trace impurities.
Field identification & locations
Identify by rhombohedral cleavage, softness, and acid fizz; avoid vinegar as it may react weakly and slowly. Common localities include Mexico, Iceland, the United States, Brazil, and China.
