Topaz stone is found in the Russian Ural Mountains and has the following chemical and physical properties:
Physical properties
- Prismatic
- Silicate minerals group
- The scratch is white / colorless
- Hardness 8
- The color is colorless / blue / yellow / pink / brown / green
- radiant
- Transparent / semi-transparent
- Vitreous sparkle
- Double refractive shape
Chemical properties
- Refractive index 1.62 / 1.63
- Density is 3.4 / 3.6
- The chemical formula of fluorine / aluminum silicate
- Not dissolve