mineral

Honey calcite (yellow calcite)

Calcite — calcium carbonate, CaCO₃

AI-generated identification · may be incorrect

Typically honey-yellow to amber, translucent, with vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The specimen appears to be a rough, partly translucent calcite fragment, though color alone cannot exclude iron-stained quartz or arago…

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms in limestone caves, hydrothermal veins, evaporite deposits, and sedimentary cavities through precipitation from carbonate-rich fluids; individual specimens may range from recent to Paleozoic or older. Yellow coloration commonly reflects iron or other trace impurities.

Uses & applications

Used for cement, lime, aggregate, and chemical production; attractive transparent pieces are collected or occasionally cut as decorative stone, but calcite is generally too soft for durable jewelry.

Geological facts

Calcite effervesces vigorously with dilute hydrochloric acid or vinegar, though coatings can reduce the reaction. It commonly shows double refraction and can be scratched easily with a steel knife.

Field identification & locations

Common worldwide, including Mexico, the United States, Iceland, China, and Peru. Confirm with a hardness test and acid reaction; avoid scratching valuable specimens.