mineral

Pink calcite (likely manganocalcite)

Calcite, CaCO₃; pink color commonly caused by manganese impurities

AI-generated identification · may be incorrect

Typically Mohs hardness 3, vitreous to pearly luster, pale pink to salmon color, and rhombohedral cleavage; it effervesces strongly with dilute hydrochloric acid. The specimen appears as a rough, rounded crystalline aggregate with weathered matrix.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins, carbonate rocks, cavities, and sedimentary limestone environments; individual crystals may range from recent growth to any age represented by the host deposit.

Uses & applications

Used mainly as a collector specimen and occasionally as ornamental stone; calcite is industrially important in cement, lime, aggregate, glass, and chemical production.

Geological facts

Manganese-bearing pink calcite is often fluorescent orange-red under ultraviolet light, though fluorescence varies. Its relatively soft surface and perfect cleavage distinguish it from pink quartz or feldspar.

Field identification & locations

Common sources include Mexico, Peru, the United States, and Europe. Test an inconspicuous spot with acid, check for rhombohedral cleavage, and avoid scratching it with a steel knife unless surface damage is acceptable.