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marble




marble
Marble. Credit: Mineral Information Institute
A metamorphic rock composed largely of recrystallized limestones and dolomites. The term is used more loosely to refer to any crystalline calcium carbonate (CaCO3) rock that has a good pattern and color when cut and polished.

The color is normally white, but when tinted by serpentine, iron oxide, or carbon can vary to shades of yellow, green, red, brown, or black. It is used for architectural and ornamental purposes. The finest Italian marble is pure white calcite and has been prized by sculptors throughout history.


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   • GEOLOGY AND PLANETARY SCIENCE