Marble is composed of sedimentary rocks and metamorphic rocks, the main component is calcium carbonate, its content is about 50% -75%. Some marble contains a certain amount of silica, and some do not contain silica.
The particles (referring to calcium carbonate) is small, the surface stripes are generally more irregular distribution, and the hardness is low. The common classification of marble are beige, white, gray, black, yellow, green, brown,red.
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