mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 (Mohs scale), Color: Orange to pale yellow, Luster: Vitreous to waxy/greasy, Crystal Structure: Trigonal/Hexagonal, Cleavage: Perfect rhombohedral

Identified July 4, 2026More mineral →

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Physical properties

Hardness: 3 (Mohs scale), Color: Orange to pale yellow, Luster: Vitreous to waxy/greasy, Crystal Structure: Trigonal/Hexagonal, Cleavage: Perfect rhombohedral

Formation & geological history

Formed through sedimentary processes, chemical precipitation in marine environments, or hydrothermal activity. Often found in massive form in limestone or marble veins.

Uses & applications

Used for lapidary work, decorative carvings, metaphysical collecting, and as a source of calcium in industrial chemical applications.

Geological facts

Calcite is one of the most common minerals on Earth. It is famous for its double refraction property and its ability to effervesce (fizz) when in contact with weak acids like vinegar.

Field identification & locations

Can be identified in the field by its soapy or waxy feel, its inability to scratch glass (distinct from orange quartz), and its reaction to hydrochloric acid. Common locations include Mexico, Brazil, and the USA.