| 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 |
5.12ct - 11x9mm (PA1551)
2.22ct - 8mm (PA1549)
2.69ct - 10x8mm (PA1545)
18.10ct (PA1541)
22.75ct - Pair (PA1520)
5.78ct - 11mm (PA1477)
8.18ct (PA1462)
0.64ct (PA1447)
126.16ct (PA1436)
5.93ct - 11mm (PA1433)
1.58ct (PA1397)
2.94ct (PA1396)
43.31ct (PA1393)
32.08ct - Pair (PA1383)
0.37ct (PA1368)
0.82ct - 6mm (PA1364)
1.68ct (PA1363)
3.41ct - 12x10mm (PA1349)
0.99ct - 8x6mm (PA1348)
3.56ct (PA1347)
3.49ct (PA1346)
1.55ct - 7mm (PA1345)
2.58ct - 10x8mm (PA1343)
2.24ct (PA1342)