mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Hardness: 3 on Mohs scale
Color: Pale orange to honey-yellow
Luster: Vitreous to waxy

Identified May 31, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Pale orange to honey-yellow; 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 precipitate from calcium-rich solutions in caves (as stalactites/stalagmites) or in marine environments. It can also occur in hydrothermal veins.

Uses & applications

Used in the manufacturing of cement and lime, as a soil conditioner in agriculture, and widely sold as polished decorative objects, carvings, and metaphysical healing stones.

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.

Field identification & locations

Identify by its orange hue, rhombohedral cleavage, and extreme softness (it can be scratched by a copper penny). It will effervesce (fizz) vigorously when in contact with weak hydrochloric acid or white vinegar.