mineral

Tumbled honey calcite

Calcite (calcium carbonate, CaCO₃)

AI-generated identification · may be incorrect

Typically translucent cream, yellow, or honey-colored with pearly to vitreous luster and prominent rhombohedral cleavage; Mohs hardness 3, uneven fracture, and specific gravity about 2.71. The rounded form indicates tumbling or natural water-wear.

Identified September 13, 2026More mineral →

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Physical properties

Formation & geological history

Calcite precipitates from hydrothermal fluids, groundwater, caves, and marine sediments; the specimen likely formed in a carbonate vein or limestone cavity, with no precise age determinable visually. Honey coloration commonly results from iron or other trace impurities.

Uses & applications

Used for cement, lime, aggregate, soil treatment, and chemical manufacture; attractive transparent pieces are collected or carved, though this small tumbled specimen has limited gem value.

Geological facts

Calcite effervesces vigorously in dilute hydrochloric acid and shows strong birefringence in clear pieces. It is one of Earth’s most common minerals and has more than 300 crystal forms.

Field identification & locations

Identify by its softness, rhombohedral cleavage, acid reaction, and lack of quartz-like hardness; common sources include Mexico, the United States, Brazil, and China. Avoid vinegar for definitive testing because the reaction may be weak.