| Mineral | Corrundum |
|---|---|
| Chemistry | Al2O3 |
| Color | Red - Vivid Red |
| Refractive Index | 1.762 - 1.770 |
| Birefringence | 0.008 - 0.010 |
| Specific Gravity | 4.00 |
| Mohs Hardness | 9.0 |
6.11ct (8N-02)
4.08ct (8N-01)
7.03ct (3L-07)
4.02ct (N20-03-1)
3.00ct (S7-102)
2.24ct (S7-69)
2.03ct (S7-45)
5.03ct (S18-31)
4.28ct - 10x8mm (S18-28)
5.13ct - 11x9mm (S18-23)
3.18ct (S18-13)
2.18ct (S6-32)
3.03ct (S6-20)
3.19ct (S6-18)
2.66ct (S6-07)
3.06ct (S9-43)
4.04ct (S9-41)
4.20ct (S9-29)
4.03ct (S9-25)
5.01ct - 11x9mm (S9-18)
5.02ct (S9-07)
2.04ct (GBB-05)
2.05ct (GBB-04)
2.04ct (SL05-19)