ndi

| Al2O3 | Fe2O3 | MgO | SiO2 | Na2O |
| > 99% | <0.1% | <0.5% | <0.2% | <0.05% |
| Item | Mtengo |
| Kumwa madzi (%) | <1 |
| Kuchulukana (g/cm3) | 1.9-2.2 |
| Kukoka kwapadera (g/cm3) | >3.6 |
| Kutentha kwa ntchito.(max) (℃) | 1650 |
| Kuwoneka kwa porosity (%) | <1 |
| Kuuma kwa Moh (mulingo) | > 9 |
| Kukana kwa Acid (%) | > 99.6 |
| Kukana kwa alkali (%) | > 85 |
| Kanthu | Mtengo |
| Kumwa madzi (%) | <1 |
| Kachulukidwe kazonyamula (g/cm3) | 1.9-2.2 |
| Kukoka kwapadera (g/cm3) | >3.6 |
| Kutentha kwa ntchito.(max) (℃) | 1650 |
| Kuwoneka kwa porosity (%) | <1 |
| Kukula | Kuphwanya mphamvu | |
| kg/chinthu | KN/chinthu | |
| 1/8" (3mm) | > 203 | >2 |
| 1/4" (6mm) | > 459 | > 4.6 |
| 1/2" (13mm) | > 877 | > 8.7 |
| 3/4" (19mm) | > 1220 | > 12 |
| 1" (25mm) | > 1630 | > 16 |
| 1-1/2"(38mm) | > 2340 | > 23 |
| 2" (50mm) | > 3460 | > 34 |