What is Marble? Marble is metamorphosed sedimentary carbonate rock. Limestone or dolomite (carbonate rocks) is the typical base minerals. The recrystallization of the carbonate minerals result in Marble. Often the original structure of the carbonate rocks is modified during the metamorphism to render the marble unrecognizable from its original state. The swirling and veins in marble often result from minerals impurities with are in layers in the original limestone or dolomite. Quartz is typically used in bathroom applications get more info from Jonathon