mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

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

Identified June 28, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through sedimentary processes, typically in marine environments or through hydrothermal deposition. It can form in large masses or as well-defined crystals in caves and veins.

Uses & applications

Used primarily as a decorative stone, in lapidary work for carvings and spheres, and as a popular specimen for crystal healing and mineral collecting.

Geological facts

Orange calcite is known for its 'soapy' or waxy feel when polished. It often fluoresces under UV light. It is chemically identical to limestone and marble but differs in its crystalline growth.

Field identification & locations

Identify in the field by its 3-way cleavage, relative softness (can be scratched by a copper penny but not a fingernail), and strong effervescence (bubbling) when exposed to weak acid like vinegar.