mineral

Tumbled calcite (likely honey/white calcite)

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Typically white to cream or honey-yellow, translucent to opaque, with vitreous to pearly luster and rhombohedral cleavage; Mohs hardness 3 and specific gravity about 2.71. The rounded shape indicates human tumbling and polishing.

Identified August 21, 2026More mineral →

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Physical properties

Formation & geological history

Forms in limestone, marble, hydrothermal veins, caves, and sedimentary deposits through precipitation or recrystallization. Calcite occurs from ancient to modern geological settings; the photograph alone cannot determine age or exact variety.

Uses & applications

Used in cement, lime, aggregate, soil treatment, and chemical production; attractive translucent pieces are sold as inexpensive decorative or metaphysical specimens. It is generally too soft for durable jewelry.

Geological facts

Calcite strongly effervesces with dilute hydrochloric acid, distinguishing it from many look-alikes; it also shows birefringence when viewed through a clear fragment. Color may result from iron or other trace impurities.

Field identification & locations

Common worldwide, especially in limestone regions; major sources include Mexico, Iceland, the United States, and China. Confirm with a copper coin or steel scratch test, cleavage, and acid reaction—avoid acid if preservation matters.