mineral

Likely pink calcite fragment

Calcite (calcium carbonate, CaCO₃)

AI-generated identification · may be incorrect

Pale salmon-pink, dull to pearly luster, irregular fractured surface; Mohs hardness 3, excellent rhombohedral cleavage, and specific gravity about 2.71. The small specimen appears massive or crystalline rather than a complete crystal.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

Calcite commonly forms by precipitation from groundwater, hydrothermal fluids, or carbonate-rich marine sediments; its age cannot be determined from the photograph. Pink color may result from manganese or iron impurities.

Uses & applications

Used industrially for cement, lime, aggregate, soil conditioning, and chemical manufacture; attractive crystals are collected, but this fragment is unlikely to have jewelry value.

Geological facts

Calcite effervesces vigorously in cold dilute hydrochloric acid and may show strong birefringence through transparent pieces. Color and texture can overlap with pink aragonite or weathered feldspar.

Field identification & locations

Common worldwide, especially in limestone, caves, hydrothermal veins, and marble; notable sources include Mexico, the United States, Iceland, and China. Confirm with a hardness test, rhombohedral cleavage, and acid reaction.