| 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 |
55.51ct (PA1310)
27.39ct (PA1289)
39.20ct (PA1287)
4.86ct (PA1245)
6.48ct (PA1242)
14.65ct - 15x13mm (PA1237)
18.37ct (PA1236)
0.85ct (PA1225)
0.92ct - 8x6mm (PA1222)
1.35ct - 8x6mm (PA1220)
0.75ct (PA1213)
4.14ct (PA1212)
10.53ct (PA1165)
7.67ct (PA1157)
13.42ct (PA1154)
4.86ct - 10mm (PA1148)
14.12ct - 16x14mm (PA1136)
36.79ct (PA1131)
12.89ct (PA1100)
7.21ct - 13x11mm (PA1099)
1.08ct (PA1095)
0.55ct - 5mm (PA1093)
0.64ct - 6x4mm (PA1092)
0.54ct - 5mm (PA1091)