| Property | Specification |
| Chemical Formula | SiO? (Silicon Dioxide) |
| Crystal System | Trigonal |
| Color | Multicolored ( black, red, orange, yellow, blue) |
| Hardness (Mohs) | 6.5 - 7 |
| Specific Gravity | 2.58 - 2.64 |
| Refractive Index | 1.530 - 1.540 |
| Birefringence | None (Isotropic) |
| Luster | Vitreous to Waxy |
| Transparency | Transparent to Opaque |
| Pleochroism | None |
| Optical Character | Uniaxial (-) |
| Dispersion | 0.013 |