mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale to deep orange; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

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

Identified July 14, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Pale to deep orange; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

Formation & geological history

Formed through sedimentary processes, often as a chemical precipitate from calcium-rich solutions in caves or marine environments, or as a byproduct of metamorphic limestone.

Uses & applications

Used in the manufacture of lime, cement, and fertilizer; also popular in jewelry, carvings, and as decorative metaphysical stones.

Geological facts

Calcite is one of the most common minerals on Earth. Orange varieties get their color from iron oxide or other impurities within the crystal lattice.

Field identification & locations

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