|
Gemstone (Gem) |
Mohs hardness
(Hardness) |
Specific Gravity (Specific Gravity) |
Index of Refraction (Refractive Index) |
Reflectivity
(Reflectivity) |
Double Refraction (Double Refraction) |
Dispersion
(Dispersion) |
| Synthetic Rutil
(Synthetic Rutil) |
6.5 | 4.25 | 2.76 | 19.75 | 0.287 | 0.330 |
| Synthetic Moissanite
(Synthetic Moissanite) |
9.25 | 3.22 | 2.67 | 20.67 | Strained | 0.104 |
| Lithium Niobate
(Lithium Niobate) |
5.5 | 4.64 | 2.55 | 14.87 | 0.090 | 0.130 |
| Diamond
(Diamond) |
10 | 3.52 | 2.417 | 17.21 | 0.00 | 0.044 |
| Strontium Titanate
(Strontium Titanate) |
5.5 | 5.13 | 2.409 | 17.09 | 0.00 | 0.19 |
| Sphalerite
(Sphalerite) |
4 | 4.10 | 2.37 | 16.53 | 0.00 | 0.156 |
| Synthetic cubic zirconia
(CZ, Cubic Zirconia) |
8.5 | 5.9 | 2.14 | 13.11 | 0.00 | 0.060 |
| Synthetic Gadolinium gallium garnet
(GGG) |
7 | 7.05 | 2.03 | 11.55 | 0.00 | 0.045 |
| Zircon
(Zircon) |
7.5 | 4.35 | 1.95 | 10.37 | 0.06 | 0.039 |
| Scheelite
(Scheelite) |
5 | 5.60 | 1.927 | 10.03 | 0.014 | 0.026 |
| Synthetic Yttrium aluminium garnet
(YAG) |
8.5 | 4.55 | 1.834 | 8.66 | 0.00 | 0.028 |
| Synthetic Sapphire
(Synthetic Sapphire) |
9 | 4.00 | 1.78 | 7.73 | 0.008 | 0.018 |
| Synthetic Spinel
(Synthetic Spinel) |
8 | 3.64 | 1.728 | 7.15 | 0.00 | 0.020 |
| Topaz
(Topaz) |
8 | 3.55 | 1.62 | 5.10 | 0.008 | 0.014 |
| Synthetic leaded glass
(Paste) |
5.5 | 3.5 | 1.60 | 5.36 | 0.00 | 0.03 |
| Beryl
(Beryl) |
8 | 2.68 | 1.57 | 4.95 | 0.007 | 0.014 |
| Crystals
(Rock Crystal) |
7 | 2.65 | 1.55 | 5.06 | 0.009 | 0.013 |
| Synthetic Rutil
(Synthetic Rutil) |
6.5 | 4.25 | 2.76 | 19.75 | 0.287 | 0.330 |
