- Citrine
- Amethyst
- Rhodolite
- Garnet
- Peridot
- London Topaz
- Swiss Blue Topaz
- Sky Blue Topaz
- White Topaz
- Smoky
- Black Spinel
- Chrome
Chemical Formula: SiO2-Silicon dioxide
Refractive Index:1.544-1.553
Hardness：7 Mohs
Melting Point：1260℃
Orignal:Brizil,USA ,Africa
The color tone of gray or brown to black (smoky quartz) are common.
Smoky Quartz is named of “Health Stone” ,it represent stick-at-itiveness ,brave and belief .