mineral

Tumbled yellow calcite

Calcite (CaCO₃)

AI-generated identification · may be incorrect

Pale honey-yellow, translucent, with a vitreous to pearly luster and likely rhombohedral cleavage; Mohs hardness 3. The rounded shape and surface shine indicate tumbling or polishing.

Identified September 29, 2026More mineral →

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Physical properties

Pale honey-yellow, translucent, with a vitreous to pearly luster and likely rhombohedral cleavage; Mohs hardness 3. The rounded shape and surface shine indicate tumbling or polishing.

Formation & geological history

Calcite forms in sedimentary and hydrothermal settings, including limestone and mineral veins. The image cannot establish the specimen’s source or geological age.

Uses & applications

Commonly sold as a decorative or collecting stone and used for small carvings; calcite also has major industrial uses in cement, lime, and agricultural applications.

Geological facts

Calcite effervesces in dilute acid and is strongly birefringent in clear crystals. Yellow coloration may come from trace impurities.

Field identification & locations

A softness test and acid reaction can help distinguish calcite from harder look-alikes, but avoid testing a polished specimen. Calcite occurs worldwide; this small tumbled piece is typically inexpensive.