mineral

Orange Calcite

Calcium Carbonate (CaCO3)

AI-generated identification · may be incorrect

Mohs hardness of 3, orange to yellow color, vitreous to pearly luster, rhombohedral crystal structure, perfect cleavage in three directions, specific gravity of 2.71

Identified July 30, 2026More mineral →

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Physical properties

Mohs hardness of 3, orange to yellow color, vitreous to pearly luster, rhombohedral crystal structure, perfect cleavage in three directions, specific gravity of 2.71

Formation & geological history

Formed in sedimentary, metamorphic, and igneous environments through the precipitation of calcium carbonate from solution, often in hydrothermal veins and limestone caves.

Uses & applications

Used in decorative items, lapidary arts, holistic and metaphysical practices, and as a calcium source in various industrial applications.

Geological facts

Calcite is the primary constituent of limestone and marble. It exhibits strong double refraction (birefringence) when clear and reacts readily with dilute hydrochloric acid.

Field identification & locations

Easily identified by its softness (can be scratched with a penny) and its effervescence with acid. Commonly found worldwide, with notable deposits in Mexico, Peru, and the USA.