mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale. Color: Pale orange to deep reddish-orange. Luster: Vitreous to waxy. Crystal structure: Trigonal/Rhombohedral. Cleavage: Perfect rhombohedral in three directions. Specific Gravity: 2.71.

Hardness: 3 on Mohs scale
Color: Pale orange to deep reddish-orange
Luster: Vitreous to waxy

Identified May 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed through sedimentary processes, often as a chemical precipitate in marine environments or through metamorphic processes in marble. It can also form in hydrothermal veins or as a secondary mineral in caves.

Uses & applications

Commonly used for ornamental carvings, polished stones for the metaphysical market, architectural accents, and as a source of calcium in chemical industries.

Geological facts

Orange calcite is often called the 'stone of the mind' in metaphysical circles. It reacts vigorously with dilute hydrochloric acid, which is a definitive test for all calcite varieties.

Field identification & locations

Identify in the field by its rhombohedral cleavage, softness (can be scratched by a copper coin), and the acid fizz test. Commonly found in Mexico, Brazil, and the USA (Utah).