mineral

Honey calcite (yellow calcite)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Typically Mohs hardness 3, vitreous to pearly luster, honey-yellow to amber color, translucent to opaque, and trigonal crystal structure with perfect rhombohedral cleavage. The specimen appears naturally weathered or roughly shaped, with possible cleavage surfaces.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins, sedimentary limestones, caves, and evaporite-related environments when calcium-rich fluids precipitate calcite. Calcite occurs from Precambrian to modern geological ages; color commonly results from iron or organic impurities.

Uses & applications

Used in cement, lime, construction aggregate, fillers, and chemical industries; transparent honey calcite is also sold as a decorative or metaphysical stone. It is generally not used as a gemstone because of its softness.

Geological facts

Calcite effervesces vigorously with dilute hydrochloric acid or vinegar, though vinegar may react slowly. It is strongly birefringent, producing doubled images when viewed through clear pieces.

Field identification & locations

Common worldwide, including Mexico, Iceland, the United States, and China. Confirm with a hardness test—calcite is scratched by a copper coin or steel—and acid reaction; avoid damaging collectible specimens.