metamorphic
White marble
Calcite marble, predominantly CaCO₃
AI-generated identification · may be incorrectCreamy white, massive and fine-grained with a dull to sugary luster; calcite hardness 3 Mohs, rhombohedral crystal structure, and no obvious cleavage on the rough surface. A drop of dilute acid should fizz if it is calcite-rich.
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Physical properties
Creamy white, massive and fine-grained with a dull to sugary luster; calcite hardness 3 Mohs, rhombohedral crystal structure, and no obvious cleavage on the rough surface. A drop of dilute acid should fizz if it is calcite-rich.
Formation & geological history
Forms when limestone or dolostone recrystallizes during heat and pressure; age depends on the source rock and metamorphic event, neither determinable from the photo.
Uses & applications
Used for sculpture, architectural facing, tile, and decorative stone; this rough, common-looking piece has little gem or collector value.
Geological facts
Marble is made of interlocking carbonate crystals, and impurities can create its characteristic veining and coloration.
Field identification & locations
The pale color and subtly crystalline appearance fit marble, but a photo cannot distinguish it confidently from other light-colored rocks such as quartzite. Common worldwide in metamorphic belts; acid reaction and a scratch test help identify it.
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