mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: bright orange to pale amber; Luster: vitreous to waxy; Crystal structure: trigonal (often rhombohedral cleavage); Cleavage: perfect in three directions; Specific gravity: 2.71

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

Identified June 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily in sedimentary environments through chemical precipitation or metamorphism of limestone. Its orange color is typically caused by iron oxide inclusions or other impurities during the crystallization process.

Uses & applications

Commonly used for ornamental carvings, decorative stones, as a source for lime in cement, and in the metaphysical/healing stone market.

Geological facts

Calcite is one of the most common minerals on Earth, but orange varieties are prized by collectors for their vibrant color. It exhibits double refraction (birefringence), meaning things seen through it appear doubled.

Field identification & locations

Identified in the field by its softness (can be scratched by a copper coin) and its strong effervescent reaction when exposed to dilute hydrochloric acid. Commonly found in Mexico, Brazil, and the USA.