MARBLES A commercially applied term to any marble, limestone, or dolomite that can take a polish. The term marble is also commonly used by those unfamiliar with different stones to refer to any polished natural stone. Pure marble contains 99% calcium carbonate (CaCO3) and is formed by re-crystallization of sedimentary limestone when subjected to metamorphic conditions. Please note that smaller sized slabs can also be supplied. Slabs can be supplied random and cut-to-size.