Smoky Quartz | |
Chemical Formula |
SiO2 |
Species |
Silicates |
Crystal System |
Trigonal |
Mohs Scale |
7 |
Specific Gravity |
2.59-2.63 |
Color |
gray, brown, black |
Luster |
Vitreous |
Diaphaneity |
Transparent, Translucent |