| Mineral | Tourmaline |
|---|---|
| Chemistry | A(D3)G6(T6O18)(BO3)3X3Z |
| Color | Vivid Red |
| Refractive Index | 1.62 - 1.64 |
| Birefringence | 0.018 - 0.040 |
| Specific Gravity | 3.06 |
| Mohs Hardness | 7.0 - 7.5 |
4.01ct (RL0068)
8.67ct (RL0067)
9.57ct (RL0066)
10.97ct (RL0052)
35.55ct (RL0036)
7.23ct (RL0013)