Mineral
Orange Calcite
Calcite (CaCO3)
AI-generated identification · may be incorrectCalcium 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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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous