 
            | Al2O3 % | Fe 2O3 % | K2 O % | Na2O % | Mg O % | 
| 20-80 | <1 | <3 | <1.5 | <0.5 | 
| Physical Properties | ||||
| Water absorption rate, % | <5 | |||
| Bulk Weight | 1200-1500 | |||
| Proportion, g/cm3 | 2.3-2.45 | |||
| Temperature resistance, V | 1300-1600 | |||
| Moh's hardness, Moh | >7 | |||
| Acid resistance,% | >98 | |||
| Alkali resistance,% | >82 | |||
| Softness, V | 1970 | |||
| Diameter range, mm | 6-75 | |||