mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 (Mohs scale); Color: Pale orange to honey-yellow; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Transparency: Translucent to opaque.

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

Identified July 18, 2026More mineral →

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Physical properties

Hardness: 3 (Mohs scale); Color: Pale orange to honey-yellow; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral; Transparency: Translucent to opaque.

Formation & geological history

Forms in various geological settings through precipitation in hot springs, limestone caves, and marine environments. It can also form through metamorphic processes in marble.

Uses & applications

Commonly used for lapidary work (tumbled stones, spheres, carvings), ornamental decor, and as a calcium source in industry. In metaphysical circles, it is used as a 'cleansing' stone.

Geological facts

Calcite is one of the most common minerals on Earth. Orange varieties get their unique hue from iron impurities trapped within the calcium carbonate structure. It exhibits double refraction (birefringence).

Field identification & locations

Identify by its relatively low hardness (can be scratched by a copper coin) and its rapid effervescence (fizzing) when exposed to cold dilute hydrochloric acid. Commonly found in Mexico, Brazil, and the USA.