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 |
7.32ct (PA1707)
20.18ct (PA1703)
42.21ct (PA1699)
90.27ct (PA1698)
48.45ct (PA1697)
43.16ct (PA1695)
120.08ct (PA1694)
66.13ct (PA1692)
83.88ct (PA1688)
2.30ct (PA1686)
0.65ct (PA1684)
1.52ct - 8x6mm (PA1683)
1.09ct - 8x6mm (PA1682)
2.02ct (PA1680)
3.53ct (PA1679)
1.42ct (PA1677)
3.77ct (PA1676)
7.60ct (PA1672)
6.01ct (PA1669)
1.07ct - 8x6mm (PA1667)
3.65ct (PA1666)
1.34ct (PA1665)
10.66ct (PA1662)
13.62ct (PA1661)