mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale. Color: Pale to deep orange. Luster: Vitreous to waxy. Crystal structure: Trigonal/Rhombohedral. Cleavage: Perfect in three directions. Specific gravity: 2.71.

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

Identified June 8, 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/Rhombohedral. Cleavage: Perfect in three directions. Specific gravity: 2.71.

Formation & geological history

Formed through sedimentary processes, often precipitated from calcium-rich water or within marine environments. It can also form in hydrothermal veins or as a constituent of metamorphic marble.

Uses & applications

Used primarily for decorative carvings, lapidary work, and architectural ornaments. In industry, calcite is used in the manufacture of cement, lime, and as a soil conditioner.

Geological facts

Calcite exhibits double refraction; if you look through a clear piece, images appear doubled. Orange calcite is particularly popular in metaphysical circles where it is associated with creativity and energy.

Field identification & locations

Identify in the field by its rhombohedral cleavage and its strong effervescent reaction to dilute hydrochloric acid. Commonly found in Mexico, Brazil, and the USA. It is much softer than quartz or fluorite.