mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Orange, peach, or reddish; Luster: Vitreous to waxy/pearly; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

Hardness: 3 on Mohs scale
Color: Orange, peach, or reddish
Luster: Vitreous to waxy/pearly

Identified July 3, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Orange, peach, or reddish; Luster: Vitreous to waxy/pearly; Crystal structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific gravity: 2.71

Formation & geological history

Forms through chemical precipitation in sedimentary environments such as hot springs, caverns, and marine settings, or through hydrothermal veins and metamorphism of limestone. Usually formed within the last few hundred million years.

Uses & applications

Used as an ornamental stone, in decorative carvings, as a source of calcium in industry, and widely collected by mineral enthusiasts for its color and metaphysical associations.

Geological facts

Orange calcite is often called the 'stone of creativity.' It reacts vigorously with dilute hydrochloric acid, producing carbon dioxide gas bubbles, which is a key diagnostic test for carbonates.

Field identification & locations

Identified by its rhombohedral cleavage, softness (can be scratched with a copper penny), and waxy appearance. Commonly found in Mexico, Brazil, and the USA. Collectors look for vibrant saturation and translucency.