mineral

Pink calcite cluster

Calcite, calcium carbonate (CaCO₃)

AI-generated identification · may be incorrect

Typically pearly to vitreous, pale pink to cream, with prominent rhombohedral cleavage and trigonal crystal structure; Mohs hardness 3 and specific gravity about 2.71. The blocky, stepped cleavage surfaces and weak translucency are characteristic.

Identified August 23, 2026More mineral →

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Physical properties

Formation & geological history

Usually forms as a low-temperature hydrothermal or cavity-filling mineral in limestone, marble, and ore deposits; the pink color may result from manganese or iron impurities. Individual specimens can form at many geological ages, commonly in relatively young cave and hydrothermal environments.

Uses & applications

Used industrially for cement, lime, aggregate, soil treatment, and chemical production; attractive crystal clusters are collected as mineral specimens, though this quality is generally not gem-grade.

Geological facts

Calcite effervesces vigorously with dilute hydrochloric acid and shows strong birefringence, producing a doubled image through clear pieces. It is one of the most common carbonate minerals.

Field identification & locations

Identify it by its softness, rhombohedral cleavage, pearly luster, and acid reaction; distinguish it from harder quartz, which lacks cleavage. Common localities include Mexico, the United States, Peru, China, and Morocco.