mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 (Mohs scale), Color: Orange to honey-gold, Luster: Vitreous to waxy, Crystal Structure: Trigonal (rhombohedral cleavage), Specific Gravity: 2.71

Identified July 9, 2026More mineral →

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Physical properties

Hardness: 3 (Mohs scale), Color: Orange to honey-gold, Luster: Vitreous to waxy, Crystal Structure: Trigonal (rhombohedral cleavage), Specific Gravity: 2.71

Formation & geological history

Forms in sedimentary environments through chemical precipitation from calcium-rich solutions, or in metamorphic marble. It is a common rock-forming mineral found worldwide.

Uses & applications

Used primarily as decorative carvings, tumbled stones for collectors, and in the metaphysical community. Industrial calcite is used in cement, antacids, and soil treatment.

Geological facts

Calcite is famous for its double refraction (birefringence) property, where light passing through a clear specimen splits into two rays. Orange varieties get their color from hematite or iron oxide inclusions.

Field identification & locations

Identify by its distinct rhombohedral cleavage (slanted cube shape) and its characteristic effervescence (bubbling) when in contact with dilute hydrochloric acid.