| Items | GCD-65 | GCD-50 | GCD-45 | |
| %    
 ≥ Chemische samenstelling | AL2O3 | 65 | 50 | 45 | 
| SIC | 12 | 10 | 8 | |
| g/cm3
  
 ≥ Bulkdichtheid | 110ºC×24h | 2.8 | 2.3 | 2.0 | 
| 1450 °C × 24 uur | 2.7 | 2.2 | 1.9 | |
| MPa  
 ≥ CCS | 110ºC×24h | 12 | 10 | 10 | 
| 1450 °C × 24 uur | 10 | 10 | 10 | |
| MPa  
 ≥ MOR | 110ºC×24h | 2.5 | 2.5 | 2.0 | 
| 1450 °C × 24 uur | 2.0 | 2.0 | 1.5 | |
| %1450ºC×24h Permanente lineaire verandering | ±1.0 | ±1.0 | ±1.0 | |