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 |
16.30ct (PA1975)
33.45ct (PA1974)
58.98ct - 23x21mm (PA1973)
3.64ct (PA1971)
3.00ct - 10x8mm (PA1970)
5.07ct (PA1969)
5.75ct - 11x9mm (PA1967)
3.55ct (PA1963)
4.41ct (PA1958)
59.92ct (PA1956)
4.73ct (PA1953)
6.41ct - 12x10mm (PA1952)
4.84ct - 11x9mm (PA1950)
42.15ct (PA1943)
41.12ct - Pair (PA1941)
32.21ct - 19x17mm (PA1939)
100.92ct (PA1938)
1.05ct (PA1935)
1.12ct - 7mm (PA1926)
1.42ct (PA1925)
4.53ct (PA1924)
10.58ct - Pair (PA1809)
0.51ct - 6x4mm (PA1620)
3.09ct - 8x6mm (PA1619)