mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Orange to salmon-pink; Luster: Vitreous to waxy/greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: Perfect rhombohedral in three directions; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Orange to salmon-pink
Luster: Vitreous to waxy/greasy

Identified May 21, 2026More mineral →

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Physical properties

Formation & geological history

Forms in sedimentary environments through chemical precipitation from calcium-rich waters or in hydrothermal veins. It often occurs as a primary mineral in marine settings or as crystalline masses in caves.

Uses & applications

Used primarily as a decorative stone, in lapidary work for carvings and spheres, and as a popular metaphysical or 'healing' crystal. Industrially, calcite is used in cement, glass-making, and acid neutralization.

Geological facts

Calcite is one of the most common minerals on Earth and is the primary component of limestone and marble. The orange color is typically caused by tiny inclusions of hematite or other iron oxides.

Field identification & locations

Identify in the field by its rhombohedral cleavage and distinct reaction (effervescence) when a drop of diluted hydrochloric acid is applied. It is commonly found in Mexico, Brazil, and the USA.