What is marble?
Marble is stone resulting from the metamorphism of sedimentary carbonate rocks–most commonly limestone or dolomite rock. The characteristic swirls and veins of marble result from various mineral impurities such as clay, silt, sand, iron oxides, silica etc which were there when the stone formed.
Marble is also quarried. Like granite, each block is cut into slabs. Colour and pattern variations will exist.