"Marble" is derived from Latin word "Marmar" which comes from the Greek root "Marmarous" meaning a shining stone. Marble is a nonfoliated metamorphic rock resulting from the metamorphism of limestone. Commercially, marble is any crystalline rock composed predominantly of calcite, dolomite or serpentine, having 3-4 hardness, which can be excavated as blocks and can be sawn into marble slabs and marble tiles. Marble is used for wall cladding, roofing and flooring and a variety of other interior and exterior applications.