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 |
18.04ct (PA0299)
5.44ct (PA0290)
4.62ct - 12x10mm (PA0285)
7.94ct - 14x12mm (PA0269)
3.57ct - 11x9mm (PA0265)
30.97ct - 21x19mm (PA0253)
22.27ct (TG0132)
11.86ct (PA0126)
4.04ct (PA0121)
9.05ct (PA0120)
8.80ct (PA0119)
7.27ct (PA0117)
2.76ct (PA0076)
44.88ct (PA0064)
7.33ct - 13x11mm (PA0055)
5.20ct - 10mm (PA0052)
12.67ct (PA0031)
34.99ct (PA0030)
42.01ct (PA0025)
4.92ct - 12x10mm (PA0014)
14.11ct (PA0009)
13.54ct (PA0006)
24.29ct (PA0005)
5.01ct (MZ0099)