| 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 |
3.02ct - 8mm (SI12-24)
3.01ct - 8mm (SI12-23)
3.01ct (SI12-21)
3.01ct (SI12-19)
3.01ct (SI12-18)
3.02ct - 10x8mm (SI12-17)
3.03ct (SI12-14)
1.59ct - 8x6mm (3L-04B)
8.20ct - 14x12mm (8N-05)
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)