mineral
Orange calcite
Calcite (CaCO₃)
AI-generated identification · may be incorrectPeach-orange, translucent to opaque, with a vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3. Its color commonly comes from iron impurities.
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Physical properties
Peach-orange, translucent to opaque, with a vitreous to pearly luster and prominent rhombohedral cleavage; Mohs hardness 3. Its color commonly comes from iron impurities.
Formation & geological history
Forms when calcium-carbonate-rich fluids precipitate in cavities, veins, and sedimentary deposits; calcite occurs in rocks of many geological ages.
Uses & applications
Used as a collectible and decorative stone; calcite is also an important industrial source of lime and a component of cement and building stone.
Geological facts
Calcite effervesces in dilute hydrochloric acid and is strongly birefringent in clear crystals.
Field identification & locations
Common worldwide in limestone caves, hydrothermal veins, and sedimentary rocks. This rough orange fragment is consistent with calcite; confirm with a scratch test (it scratches easily with a copper coin) or an acid test.
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Epidote
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Granite (Phaneritic intrusive igneous rock)
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