 Marble is basically metamorphosed
limestone. Once a limestone is subjected to heat and pressure, the
calcium carbonate re-crystallizes into marble. Marbles have similar
characteristics to limestones. It can be used for both interior and
exterior applications.
The characteristic swirls and veins
of many coloured marble varieties are usually due to various mineral
impurities such as clay, silt, sand, or iron oxides which were origionally
present as grains or layers in the limestone.
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