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Marble
Group of rocks used for ornamental purposes (scupture) and as
building material. True marble is metamorphosed limestone, composed
of faily pure calcite (a crystalline form of calcium carbonate).
This marble is white or lightly colored and usually contains
dark veins and inclusions (they are usually due to various mineral
impurities, originally deposited as grains or layers in the
limestone, which were partially dissolved and stirred when the
marble was in the molten or semi-molten state).
Some marble is also formed from Dolomite and Serpentine. Marble
may be light to dark in color, and there are dozens of different
types.
Link:
TUMMER-Turkish
Association of Marble, Natural Stone and Machinery Producers
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