mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Paler to bright orange; Luster: Vitreous to waxy; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

Hardness: 3 on Mohs scale
Color: Paler to bright orange
Luster: Vitreous to waxy

Identified April 5, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Paler to bright orange; Luster: Vitreous to waxy; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

Formation & geological history

Formed in sedimentary environments through chemical precipitation or as a primary mineral in igneous and metamorphic rocks. Often found in massive forms in limestone deposits and hydro-thermal veins.

Uses & applications

Used primarily as a decorative stone, in lapidary arts for carvings/beads, and in the metaphysical/collecting community. Industrially, calcite is used in cement, agriculture, and optics.

Geological facts

Orange calcite is known for its ability to fluoresce under UV light. It is one of the most common minerals on Earth, but the bright orange variety is specifically prized for its vibrant aesthetic.

Field identification & locations

Identify in the field by its 3-way cleavage (rhombohedral) and it will effervesce (fizzle) when exposed to a weak acid like vinegar. Found globally, with notable deposits in Mexico and Brazil.