mineral

Tumbled honey calcite

Calcite (calcium carbonate, CaCO₃)

AI-generated identification · may be incorrect

Typically pale honey-yellow to translucent, with vitreous to pearly luster and rhombohedral cleavage; Mohs hardness 3, specific gravity about 2.71. The rounded shape indicates tumbling or natural abrasion, and the internal cloudy texture may reflect cleavage surfaces or inclusions.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Calcite forms in hydrothermal veins, caves, sedimentary limestones, and metamorphic marbles from precipitation of calcium-rich fluids. Its age depends on the host deposit, ranging from recent cave growth to ancient Paleozoic or older rocks.

Uses & applications

Used for cement, lime, aggregate, soil treatment, and chemical production; attractive transparent pieces are collected or used as decorative stones, though calcite is too soft for most jewelry.

Geological facts

Calcite effervesces strongly in dilute hydrochloric acid and commonly shows birefringence, producing doubled images through clear pieces.

Field identification & locations

Common worldwide, including Mexico, Iceland, the United States, Brazil, and China. Confirm with a hardness test against a copper coin or steel: calcite scratches easily and should not scratch glass.