mineral

Orange calcite

Calcite (CaCO₃), likely honey/orange calcite

AI-generated identification · may be incorrect

Typically Mohs hardness 3, vitreous to pearly luster, translucent orange-yellow color, and excellent rhombohedral cleavage; the irregular piece appears partly translucent and naturally fractured. Color commonly comes from iron or other trace impurities.

Identified August 7, 2026More mineral →

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Physical properties

Formation & geological history

Forms in sedimentary limestone, hydrothermal veins, caves, and carbonatite environments through precipitation from carbonate-rich fluids. Calcite deposits range from modern to Precambrian in age.

Uses & applications

Common specimens are used for mineral collecting, décor, and educational demonstrations; calcite is also a major industrial source of lime and cement, though this orange material is usually too attractive or small for industrial use.

Geological facts

Calcite effervesces vigorously in dilute hydrochloric acid and shows strong birefringence, producing doubled images through clear pieces. It is softer than a steel knife and can be scratched readily.

Field identification & locations

Identify it by its orange translucency, rhombohedral cleavage, low hardness, and acid reaction; distinguish it from orange aragonite or quartz by calcite’s softness and cleavage. Common sources include Mexico, Brazil, the United States, and China.