mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale. Color: Pale orange to deep amber. Luster: Vitreous to waxy. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 2.71.

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

Identified July 17, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale. Color: Pale orange to deep amber. Luster: Vitreous to waxy. Crystal Structure: Trigonal. Cleavage: Perfect rhombohedral. Specific Gravity: 2.71.

Formation & geological history

Formed through sedimentary processes or in hydrothermal veins where calcium-rich fluids precipitate. It is a common constituent of sedimentary rocks like limestone. Often found in deposits dating from the Paleozoic to the Cenozoic eras.

Uses & applications

Used primarily as decorative specimens, in lithotherapy (healing crystals), as a source of lime for cement, and occasionally in jewelry, though its softness limits its use to pendants or earrings.

Geological facts

Calcite manifests in over 800 different forms of crystals. Orange calcite specifically is known for its 'acid-washed' or waxy feel when processed. It will effervesce (fizz) vigorously when in contact with weak acids like vinegar.

Field identification & locations

Can be identified by its rhombohedral cleavage and relative softness (can be scratched by a copper penny but not a fingernail). Commonly found in Mexico, Brazil, and the USA. Collectors look for vibrant saturation and translucency.