Chemical Formula |
SiO2 |
Color |
Red, Green, Brown, Multicolored |
Hardness |
7 |
Crystal System |
Hexagonal |
Refractive Index |
1.54 - 1.55 |
SG |
2.63 - 2.65 |
Transparency |
Opaque |
Double Refraction |
.009 |
Luster |
Vitreous |
Cleavage |
Indiscernible |
Mineral Class |
Quartz (Chalcedony) |
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