mineral
Orange Calcite
Calcite, CaCO3 (Calcium Carbonate)
AI-generated identification · may be incorrectHardness: 3 (Mohs scale), Color: Orange to peach, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Perfect rhombohedral in 3 directions, Specific gravity: 2.71
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Physical properties
Hardness: 3 (Mohs scale), Color: Orange to peach, Luster: Vitreous to pearly, Crystal structure: Trigonal, Cleavage: Perfect rhombohedral in 3 directions, Specific gravity: 2.71
Formation & geological history
Forms in sedimentary environments, often in caves as stalactites or stalagmites, or through precipitation from calcium-rich water. It can also form in hydrothermal veins.
Uses & applications
Used in the production of cements and mortars, as an acid neutralizer, and popular among collectors and in metaphysical practices.
Geological facts
Calcite exhibits strong double refraction (birefringence), meaning objects viewed through a clear piece of calcite appear doubled. Orange calcite gets its color from iron impurities.
Field identification & locations
Identified by its rhombohedral cleavage, softness (can be scratched by a copper penny), and effervescence (fizzing) when exposed to weak acids like dilute hydrochloric acid.
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