mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale to vibrant orange/peach; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Pale to vibrant orange/peach
Luster: Vitreous to waxy

Identified April 7, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Pale to vibrant orange/peach; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Formed through sedimentary processes, often Precipitating in marine environments or through hydrothermal activity. Orange coloration is caused by iron oxide inclusions or other impurities. Commonly found in massive form rather than distinct crystals.

Uses & applications

Primarily used for ornamental purposes, decorative carvings, metaphysical 'healing' stones, and as a calcium source in chemical industries.

Geological facts

Orange calcite is often called the 'stone of creativity.' It reacts vigorously (effervesces) with dilute hydrochloric acid, which is a primary diagnostic test for carbonate minerals.

Field identification & locations

Identify in the field by its characteristic softness (can be scratched by a copper penny) and its waxy 'soapy' feel when polished. Commonly found in Mexico, USA, and Brazil.