mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale orange to deep amber; Luster: Vitreous to waxy/resinous; Crystal System: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Pale orange to deep amber
Luster: Vitreous to waxy/resinous

Identified May 18, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily through chemical precipitation in sedimentary environments, hydrothermal veins, or as a constituent of metamorphic marble. Often found in massive forms rather than distinct crystals in this variety.

Uses & applications

Used as an ornamental stone, in carvings, as a source for lime in agriculture, and highly popular as a decorative 'healing stone' or collector's specimen.

Geological facts

Calcite is one of the most common minerals on Earth and is the primary component of limestone and marble. Orange calcite specifically gets its color from tiny inclusions of hematite or other iron oxides during formation.

Field identification & locations

Identify by its 3.0 hardness (can be scratched by a copper penny but not a fingernail) and its reaction to dilute hydrochloric acid (it will effervesce or fizz). Found globally, with notable deposits in Mexico and Brazil.