mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Honey-orange to golden; Luster: Vitreous to waxy/soapy; Crystal Structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Honey-orange to golden
Luster: Vitreous to waxy/soapy

Identified July 12, 2026More mineral →

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Physical properties

Formation & geological history

Formed through sedimentary processes, primarily from the shells of marine organisms or as chemical precipitates in caves and hot springs. It commonly occurs in massive form in limestone and marble environments.

Uses & applications

Used as decorative carvings, tumbled stones for collectors, and in the production of cement, fertilizer, and acid neutralizers in industry. Also popular as a metaphysical healing stone.

Geological facts

Calcite is one of the most common minerals on Earth and the primary constituent of limestone and marble. Orange calcite is particularly known for its characteristic 'waxy' or 'soapy' feel compared to other minerals.

Field identification & locations

Can be identified in the field by its Mohs hardness of 3 (can be scratched by a copper coin) and its vigorous effervescence (bubbling) when exposed to cold dilute hydrochloric acid. It is commonly found in Mexico, Brazil, and the USA.