mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 (Mohs scale), Color: Orange to honey-gold, Luster: Vitreous to waxy, Crystal Structure: Trigonal/Hexagonal, Cleavage: Perfect rhombohedral

Identified July 17, 2026More mineral →

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Physical properties

Hardness: 3 (Mohs scale), Color: Orange to honey-gold, Luster: Vitreous to waxy, Crystal Structure: Trigonal/Hexagonal, Cleavage: Perfect rhombohedral

Formation & geological history

Formed primarily through sedimentary processes, including chemical precipitation from calcium-rich water or as biological remains in marine environments. It can also occur in metamorphic and igneous rocks.

Uses & applications

Used as an ornamental stone, a source of calcium in industry, in the manufacturing of cement, as an acid neutralizer, and as popular crystals for collectors and healers.

Geological facts

Calcite is famous for its double refraction property; when clear, it can split light into two rays. Orange calcite specifically gets its color from tiny iron oxide or hematite inclusions.

Field identification & locations

Can be identified in the field by its softness (scratched by a copper penny) and its strong effervescent reaction to dilute hydrochloric acid. It often feels slightly soapy or waxy to the touch.