Technical Details
Chemical Composition and Name | SiO2 - Silicon dioxide | |
Hardness (Mohs Scale) | 7 | |
Specific Gravity* | 2.65 - 2.66 | |
Refractive index (R.I.) | 1.543 - 1.552 to 1.545 - 1.554 | |
Birefringence | 0.009 | |
Optic Sign | Positive | |
Optical Character | Uniaxial |