mineral

Orange calcite

Calcite (CaCO₃)

AI-generated identification · may be incorrect

Likely translucent to opaque, pale orange-white calcite with a vitreous to pearly luster and prominent cleavage; calcite has trigonal crystal structure, Mohs hardness 3, and specific gravity about 2.7. The orange color may come from iron staining or inclusions; appearance alone cannot confirm the identification.

Identified October 15, 2026More mineral →

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Physical properties

Formation & geological history

Calcite forms in sedimentary settings, hydrothermal veins, and cavities, often precipitating from calcium-rich water; its age depends on the deposit and cannot be determined from the image.

Uses & applications

Used as a decorative and collecting specimen; calcite also serves as a major source of lime and is used in cement, construction aggregate, and industrial fillers.

Geological facts

Calcite effervesces in dilute hydrochloric acid and is readily scratched by a copper coin or knife, useful checks for identification.

Field identification & locations

Common worldwide, especially in limestone and hydrothermal deposits. The pale color and blocky cleavage fit calcite, but a hardness or acid test would help distinguish it from similar minerals.