mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

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

Identified July 6, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through sedimentary processes, often precipitated from marine environments or hydrothermal veins. It is a common constituent of sedimentary rocks such as limestone.

Uses & applications

Used as an ornamental stone, in metaphysical practices, and as a source of calcium in industrial chemical manufacturing.

Geological facts

Calcite is famous for its double refraction property. When light passes through a clear crystal, it splits into two rays, making objects behind it appear doubled. It also reacts vigorously with cold dilute hydrochloric acid.

Field identification & locations

Identified in the field by its low hardness (can be scratched by a copper coin) and its rhombohedral cleavage fragments. Commonly found in Mexico, USA, and Brazil. Collectors should look for its distinctive waxy feel when polished.