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 |
7.41ct - 13mm (PA1572)
102.46ct (PA1571)
101.67ct (PA1570)
1.57ct (PA1562)
3.57ct (PA1559)
3.62ct - 9mm (PA1553)
5.12ct - 11x9mm (PA1551)
2.22ct - 8mm (PA1549)
2.69ct - 10x8mm (PA1545)
49.41ct (PA1531)
1.72ct (PA1523)
22.75ct - Pair (PA1520)
89.36ct (PA1510)
5.78ct - 11mm (PA1477)
8.18ct (PA1462)
70.31ct (PA1458)
0.64ct (PA1447)
126.16ct (PA1436)
5.93ct - 11mm (PA1433)
36.49ct (PA1419)
1.58ct (PA1397)
2.94ct (PA1396)
43.31ct (PA1393)
32.08ct - Pair (PA1383)