Hardness Mohs: 4 Unit Volume by Weight gr/cm3: 2,75Density gr/cm3: 2,79Water Absorption at Atmspheric Pressure By Weight(%): 0,2 By Volume(%): 0,4Water Absorption at Boiling Water By Weight(%): 0,1 By Volume(%): 0,4Porosity (%): 0,4Compressive Strenght kgf/cm2: 1.019Compressive Strenght After Freezing kgf/cm2: 1.019