mineral

Pink calcite (likely manganoan calcite)

Calcite, CaCO₃; pink color commonly from manganese impurities

AI-generated identification · may be incorrect

Typically pale to vivid pink, translucent to opaque, with glassy-to-pearly luster and prominent rhombohedral cleavage; Mohs hardness 3, specific gravity about 2.7. The specimen appears massive and fractured rather than well crystallized.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Forms when calcium-rich fluids precipitate in veins, cavities, hydrothermal deposits, or carbonate rocks; manganese can create the pink coloration. Its exact geological age cannot be determined from the photograph.

Uses & applications

Collected as a decorative mineral and occasionally cut or polished for ornaments; too soft for most jewelry and unsuitable as a durable construction stone.

Geological facts

Calcite effervesces readily with dilute hydrochloric acid, especially on a fresh surface, and shows strong birefringence—printed text may appear doubled through clear pieces.

Field identification & locations

Common in Mexico, Peru, Brazil, the United States, and other carbonate-rich regions. Confirm with a hardness test against a copper coin and acid reaction; pink quartz is harder and does not effervesce.