mineral

Tumbled honey calcite

Calcite (CaCO₃), likely translucent yellow variety

AI-generated identification · may be incorrect

Mohs hardness 3; pale honey-yellow to cream, vitreous-to-pearly luster, translucent, commonly rhombohedral cleavage, and relatively low specific gravity (~2.71). The rounded shape and surface shine indicate tumbling/polishing.

Identified September 17, 2026More mineral →

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Physical properties

Formation & geological history

Calcite precipitates from carbonate-rich groundwater, hydrothermal fluids, or sedimentary environments; yellow color commonly results from iron or other trace impurities. Calcite formed throughout geologic time, rather than belonging to one specific age.

Uses & applications

Used as a decorative and lapidary stone, educational specimen, and occasional low-value cabochon; calcite is also important industrially in cement, lime, aggregate, and neutralizing acidic soils.

Geological facts

Calcite effervesces vigorously in dilute hydrochloric acid and shows strong birefringence. It is much softer than quartz, so polished pieces scratch relatively easily.

Field identification & locations

Identify by its soft hardness, pale honey color, rhombohedral cleavage, and acid reaction; common sources include Mexico, the United States, Iceland, and China. A steel knife can scratch it, while quartz generally cannot.