mineral

Orange calcite

Calcite (CaCO₃), likely a botryoidal or rough aggregate

AI-generated identification · may be incorrect

Typically Mohs hardness 3, vitreous to pearly luster, orange to honey coloration, translucent edges, and rhombohedral cleavage; the specimen appears irregular and possibly naturally weathered or polished. Color may come from iron or other trace impurities.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Forms in sedimentary carbonate environments, hydrothermal veins, caves, and altered igneous rocks through precipitation from calcium-rich fluids. Calcite deposits range from modern to hundreds of millions of years old.

Uses & applications

Used in cement, lime, construction aggregate, soil treatment, and chemical manufacturing; attractive orange specimens are collected or used decoratively rather than as gemstones.

Geological facts

Calcite effervesces strongly with dilute hydrochloric acid and shows birefringence, producing doubled images through clear pieces. Orange calcite is commonly sold as a lapidary and metaphysical specimen.

Field identification & locations

Common localities include Mexico, the United States, Brazil, and China. Confirm with a hardness test against a copper coin and an acid reaction; the image alone cannot exclude orange aragonite or dyed material.