mineral
Yellow-orange tumbled stone, possibly calcite
Uncertain from the image; likely calcite (CaCO₃)
AI-generated identification · may be incorrectOpaque, rounded yellow-orange piece with a smooth, waxy-to-dull surface. If calcite, hardness is 3 Mohs, with trigonal crystal structure and prominent rhombohedral cleavage; the photo does not confirm composition.
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Physical properties
Opaque, rounded yellow-orange piece with a smooth, waxy-to-dull surface. If calcite, hardness is 3 Mohs, with trigonal crystal structure and prominent rhombohedral cleavage; the photo does not confirm composition.
Formation & geological history
Calcite commonly forms in sedimentary rocks and hydrothermal veins through mineral precipitation. Its geological age and specific formation setting cannot be determined from appearance alone.
Uses & applications
Small polished specimens are used for collecting and decoration; calcite also has major industrial uses in cement, lime, and soil treatment.
Geological facts
Color alone is not diagnostic: several minerals and dyed stones can look similar when tumbled.
Field identification & locations
A hardness test and dilute acid reaction can help identify calcite; inspect fresh surfaces for cleavage. Calcite occurs worldwide, especially in limestone and marble regions.
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