mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Hardness: 3 on Mohs scale
Color: bright orange to pale honey
Luster: vitreous to waxy

Identified July 12, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through sedimentary processes, chemical precipitation, or in metamorphic environments. It is a common rock-forming mineral found in limestone and marble formations of various geological ages.

Uses & applications

Used primarily as decorative stones, in lapidary work (carvings and spheres), as a source of calcium in industry, and as a popular specimen for gemstone collectors and metaphysical practitioners.

Geological facts

Orange calcite gets its vibrant color from tiny inclusions of hematite or iron oxide. It is known for its distinct 'soapy' or waxy feel when handled and exhibits double refraction if clear enough.

Field identification & locations

Identify by its orange color, rhombohedral cleavage, and extreme softness (can be scratched by a copper penny). It will effervesce (fizz) when in contact with dilute hydrochloric acid. Commonly found in Mexico and Brazil.