Hardness Mohs: 3 Unit Volume by Weight gr/cm3: 2,61Density gr/cm3: 2,72Water Absorption at Atmspheric Pressure By Weight(%): 0,99 By Volume(%): 2,63Water Absorption at Boiling Water By Weight(%): 1,48 By Volume(%): 3,78Porosity (%): 3,2Compressive Strenght kgf/cm2: 1019Compressive Strenght After Freezing kgf/cm2: 521