Stone material hardness with mohs hardness as the calculating white marble slabs unit, mohs hardness in 6 to 7 belongs to hard stone, granite, for example, mohs hardness in 3-5 belongs to hard stone, marble, for example, mohs hardness in 1 or 2 as the soft stone, such as limestone and dolomite.Big li shi: because marble is general contains impurities, and calcium carbonate by carbon...