mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: bright orange to yellow-orange; Luster: vitreous to waxy/resinous; Crystal System: Trigonal (often found in rhombohedral cleavage fragments); Cleavage: Perfect in three directions; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: bright orange to yellow-orange
Luster: vitreous to waxy/resinous

Identified June 6, 2026More mineral →

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Physical properties

Formation & geological history

Forms primarily through chemical precipitation in sedimentary environments such as caverns (stalactites/stalagmites) or as hot spring deposits. It can also form during the metamorphism of limestone into marble.

Uses & applications

Extensively used as a decorative stone, in lapidary work for carvings and spheres, and as a popular specimen for metaphysical and mineral collectors. Industrial uses of calcite include cement and soil conditioner.

Geological facts

Calcite is one of the most common minerals on Earth. Orange calcite specifically gets its vibrant color from minute hematite inclusions or other iron-containing impurities within the crystal lattice.

Field identification & locations

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