mineral
Honey-colored calcite on dark matrix
Calcite (CaCO₃), likely with an unidentified host-rock matrix
AI-generated identification · may be incorrectHoney-yellow to brown, translucent calcite with vitreous to pearly luster and prominent cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The matrix cannot be identified reliably from the image.
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Physical properties
Honey-yellow to brown, translucent calcite with vitreous to pearly luster and prominent cleavage; Mohs hardness 3, trigonal crystal system, specific gravity about 2.71. The matrix cannot be identified reliably from the image.
Formation & geological history
Calcite commonly forms when calcium-rich fluids precipitate in fractures, cavities, or sedimentary rocks; its age and exact formation setting cannot be determined from the photograph.
Uses & applications
Commonly collected as a mineral specimen; calcite is also used in cement, lime, construction aggregate, and industrial fillers.
Geological facts
Calcite effervesces strongly in dilute hydrochloric acid and splits into rhombohedral cleavage fragments.
Field identification & locations
Look for its relatively soft surface, rhombohedral cleavage, and acid reaction; calcite occurs worldwide in limestone, caves, veins, and hydrothermal deposits. The pictured specimen’s locality is unknown.
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