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 |
1.94ct - 9x7mm (PA0793)
0.67ct (PA0791)
0.57ct - 6x4mm (PA0785)
0.65ct - 7x5mm (PA0780)
2.84ct (PA0775)
1.46ct (PA0772)
10.00ct (PA0739)
13.03ct (PA0735)
6.40ct - 12x10mm (PA0723)
3.87ct - 11x9mm (PA0706)
1.20ct (PA0695)
1.22ct (PA0658)
3.50ct (PA0650)
5.11ct - 12x10mm (PA0622)
4.90ct (PA0616)
5.38ct - 11x9mm (PA0609)
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)