mineral

Orange calcite

Calcite, CaCO₃

AI-generated identification · may be incorrect

Typically orange, translucent to opaque, with a vitreous to pearly luster and prominent rhombohedral cleavage. Mohs hardness 3; trigonal crystal system; specific gravity about 2.7.

Identified October 3, 2026More mineral →

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Physical properties

Typically orange, translucent to opaque, with a vitreous to pearly luster and prominent rhombohedral cleavage. Mohs hardness 3; trigonal crystal system; specific gravity about 2.7.

Formation & geological history

Forms in sedimentary limestone and marble, veins, and caves through precipitation or alteration of calcium carbonate; its age depends on the host deposit.

Uses & applications

Used as a decorative and collectible mineral; calcite also serves in cement, lime, and agricultural applications, though this small specimen is mainly ornamental.

Geological facts

Calcite effervesces in dilute hydrochloric acid and exhibits strong double refraction in transparent pieces.

Field identification & locations

The orange color and cleavage faces are consistent with orange calcite, but the image alone cannot confirm the identification. It is common in mineral deposits worldwide; typical rough specimens of this size sell for about $2–$15.