mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Orange, pale yellow to deep orange-red; Luster: Vitreous to waxy/pearly; Crystal structure: Trigonal; Cleavage: Perfect rhombohedral in three directions; Specific gravity: 2.71

Hardness: 3 on Mohs scale
Color: Orange, pale yellow to deep orange-red
Luster: Vitreous to waxy/pearly

Identified June 19, 2026More mineral →

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Physical properties

Formation & geological history

Forms through chemical precipitation from calcium-rich solutions in sedimentary environments, hot springs, or as a secondary mineral in igneous rocks. Found in geological formations ranging from Precambrian to Holocene.

Uses & applications

Used as a decorative stone, in lapidary work for carvings or polished stones, and as a calcium source in chemical industries. Also popular in metaphysical and crystal collecting communities.

Geological facts

Orange calcite gets its distinct color from inclusions of hematite or other iron oxides. It is famous for its 'waxy' texture when handled and its double refraction property (birefringence).

Field identification & locations

Identify 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 and Brazil.