mineral

Tumbled honey calcite (probable)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Identified August 12, 2026More mineral →

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Physical properties

Pale honey-yellow, translucent, glassy to pearly luster, and commonly showing internal banding or cloudy zones; Mohs hardness 3, rhombohedral crystal structure, perfect rhombohedral cleavage, and specific gravity about 2.71. The dark spots may be inclusions, surface pits, or drilled holes, so identification from the photo is provisional.

Formation & geological history

Calcite forms in sedimentary limestones, hydrothermal veins, caves, and geodes through precipitation from calcium-rich fluids; specimens may range from modern deposits to Paleozoic and younger host rocks. This piece appears polished or tumbled.

Uses & applications

Used for cement, lime, construction aggregate, soil treatment, and optical/calcareous materials; attractive honey calcite is sold as a lapidary and metaphysical specimen. It is too soft for most durable jewelry.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid or vinegar if freshly scratched, unlike quartz. It commonly exhibits double refraction, visible through a clear cleavage fragment.

Field identification & locations

Common locations include Mexico, the United States, Iceland, and Brazil; test softness with a copper coin or knife cautiously, and check for acid reaction and rhombohedral cleavage. Avoid prolonged soaking in acids.