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 |
1.99ct (PA1870)
2.33ct (PA1869)
2.14ct - 8mm (PA1868)
1.77ct - 7mm (PA1865)
2.28ct (PA1862)
2.89ct - 10x8mm (PA1861)
2.98ct (PA1860)
2.90ct (PA1859)
32.04ct - 19x17mm (PA1858)
2.21ct (PA1857)
2.29ct - 9x7mm (PA1855)
2.32ct - 7mm (PA1854)
16.30ct (PA1852)
1.47ct - 8x6mm (PA1850)
2.27ct - 7mm (PA1849)
2.39ct (PA1844)
2.74ct (PA1843)
4.94ct (PA1840)
3.95ct - 10mm (PA1838)
11.94ct (PA1837)
12.65ct - 16x14mm (PA1836)
9.97ct - 14x12mm (PA1833)
1.19ct - 8x6mm (PA1832)
8.28ct - 14x12mm (PA1831)