| 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 |
0.57ct - 6x4mm (PA0785)
0.65ct - 7x5mm (PA0780)
2.84ct (PA0775)
1.46ct (PA0772)
13.03ct (PA0735)
6.40ct - 12x10mm (PA0723)
3.87ct - 11x9mm (PA0706)
1.71ct (PA0693)
1.22ct (PA0658)
5.11ct - 12x10mm (PA0622)
4.90ct (PA0616)
0.71ct - 6x4mm (PA0583)
1.59ct (PA0575)
3.52ct (PA0531)
0.37ct - 6x4mm (PA0450)
0.38ct - 6x4mm (PA0449)
18.04ct (PA0299)
5.44ct (PA0290)
4.62ct - 12x10mm (PA0285)
3.57ct - 11x9mm (PA0265)
37.26ct - 21x19mm (PA0253)
4.04ct (PA0121)
8.80ct (PA0119)
7.27ct (PA0117)