| Mineral | Corrundum |
|---|---|
| Chemistry | Al2O3 |
| Color | Greenish Blue - Bluish Green |
| Refractive Index | 1.762 - 1.770 |
| Birefringence | 0.008 - 0.010 |
| Specific Gravity | 4.00 |
| Mohs Hardness | 9.0 |
1.32ct - 7x5mm (TL0028)
1.24ct - 7x5mm (TL0017)
1.72ct - 7x5mm (TL0013)
1.62ct (TL0011)