Mineral
Orange Calcite
Calcite (CaCO3)
Calcium Carbonate
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Physical properties
Calcium Carbonate
Formation & geological history
Deposits in sedimentary environments, often found in caves as stalactites and stalagmites, hot springs, and veins in igneous and metamorphic rocks. Formation starts when calcium-rich waters evaporate, depositing calcium carbonate. Orange coloration is due to inclusions of iron.
Uses & applications
Decorative items, carvings, and as a source of calcium carbonate for various industrial applications. Not typically used in jewelry due to its softness. Historically used in optical instruments due to its birefringence. Used in fertilizers, cement, and as a flux in smelting.
Geological facts
Commonly found in Mexico, the USA, Brazil, and Iceland. Exhibits perfect rhombohedral cleavage. Will effervesce when in contact with dilute hydrochloric acid. It is triboluminescent, meaning it will briefly emit light when fractured or crushed in the dark.
Field identification & locations
A common and widely distributed mineral that forms in a variety of geological settings. Its distinct orange color and relatively low hardness make it popular for ornamental purposes.
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Green Apatite on Albite
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