mineral

Honey calcite (rough calcite specimen)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Pale honey to peach-colored, translucent, with vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, specific gravity about 2.71. The irregular blocky surfaces and internal cleavage are consistent with calcite, though the image alone cannot exclude pale dolomite or quartz-rich material.

Identified August 29, 2026More mineral →

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Physical properties

Formation & geological history

Forms in limestone, hydrothermal veins, caves, and evaporite-related settings through precipitation from calcium-rich fluids; specimens may range from Precambrian to modern. The color commonly results from iron or other trace impurities.

Uses & applications

Used industrially in cement, lime, aggregate, soil treatment, and chemical manufacture; clear crystals are collected and occasionally fashioned as decorative objects, but this rough piece is not typically jewelry-grade.

Geological facts

Calcite strongly effervesces with dilute hydrochloric acid or vinegar after scratching a fresh surface, whereas quartz does not. It shows excellent rhombohedral cleavage and can display double refraction through clear areas.

Field identification & locations

Common worldwide, especially in limestone regions, hydrothermal deposits, and caves; test cautiously with vinegar, inspect cleavage, and avoid mistaking it for quartz or dolomite. Likely locations include Mexico, the United States, Brazil, and China.