mineral

Tumbled pink calcite

Calcite (calcium carbonate, CaCO₃)

AI-generated identification · may be incorrect

Pale pink, smooth and waxy to pearly, with faint curved cleavage/fracture lines; Mohs hardness 3, trigonal crystal structure, and specific gravity about 2.71. The rounded form indicates tumbling or natural abrasion.

Identified September 10, 2026More mineral →

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Physical properties

Formation & geological history

Calcite forms in limestone, veins, caves, and hydrothermal environments; pink color commonly comes from manganese or iron impurities. Most specimens are geologically young relative to Earth’s history, though the host rock may be far older.

Uses & applications

Used for cement, lime, agricultural soil treatment, construction aggregate, and calcium products; attractive pink pieces are sold as inexpensive décor or metaphysical specimens.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid or household vinegar, especially when powdered or freshly scratched. It can be scratched easily with a steel knife.

Field identification & locations

Commonly found in limestone regions, hydrothermal veins, and caves worldwide, including Mexico, Peru, Brazil, and the United States. Confirm with a vinegar fizz test and very low hardness; the photograph alone cannot exclude pale rose quartz or polished aragonite.