mineral

Orange Calcite

Calcite (Calcium Carbonate - CaCO3)

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

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

Identified April 1, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through sedimentary processes, often precipitated from marine organism shells or in hydrothermal veins and hot springs. It can occur in wide-ranging geological environments from Precambrian to recent ages.

Uses & applications

Used primarily as decorative carvings, ornamental stones, and in metaphysical/holistic practices. Industrial calcite is used in cement, agriculture, and acid neutralization.

Geological facts

Orange calcite is known for its 'waxy' texture when unpolished. Calcite is one of the most common minerals on Earth and is the primary constituent of limestone and marble.

Field identification & locations

Identify in the field by its low hardness (it can be scratched by a copper penny) and its effervescence (bubbles) when in contact with weak acid like vinegar. Commonly found in Mexico, USA, and Brazil.