- Citrine
- Amethyst
- Rhodolite
- Garnet
- Peridot
- London Topaz
- Swiss Blue Topaz
- Sky Blue Topaz
- White Topaz
- Smoky
- Black Spinel
- Chrome
Chemical Formula: Al2SiO4(F,OH)2 Fluor containing aluminum silicate
Refractive Index:1.619-1.627
Hardness：8 Mohs
Orignal:Brizil,Nigeria ect.
Natural Colorless Topaz is exposed to radiation (a process known as irradiation) and then usually heated,
to produce striking blue colors. The color treatment is usually performed on grayish-blue or silver-gray gemstones.
A deep blue enhanced topaz is known as "London blue”. Its represent good faith ,persistant love ,clarm and stateliness .