| Mineral | Tourmaline (Elbaite) |
|---|---|
| Chemistry | Na(Li1.5,Al1.5)Al6Si6O18(BO3)3(OH)4 |
| Color | Green - Blue |
| Refractive Index | 1.624 - 1.644 |
| Birefringence | 0.018 - 0.040 |
| Specific Gravity | 3.06 |
| Mohs Hardness | 7.0 - 7.5 |
3.49ct - 11x9mm (PA0877)
7.15ct (PA0876)
0.57ct - 6x4mm (PA0864)
0.54ct (PA0862)
1.55ct (PA0847)
0.46ct - 6x4mm (PA0846)
1.26ct (PA0845)
0.68ct (PA0844)
0.35ct (PA0843)
0.96ct (PA0842)
0.80ct - 8x6mm (PA0841)
0.33ct (PA0839)
0.39ct - 6x4mm (PA0834)
0.99ct - 7x5mm (PA0833)
0.87ct (PA0831)
1.83ct (PA0827)
0.58ct (PA0823)
0.36ct - 6x4mm (PA0800)
0.37ct - 6x4mm (PA0799)
1.21ct (PA0797)
1.37ct - 8x6mm (PA0794)
1.94ct - 9x7mm (PA0793)
0.67ct (PA0791)
0.86ct (PA0790)