Class VIII: Silicates
From The Gemology Project
Clas VIII | Silicates |
---|---|
Andalusite | Al2SiO5 |
Beryl | Be3Al2 (SiO3)6 |
Cordierite (Iolite) | Mg2Al4Si5O18 |
Garnets | X3Y2Si3O12 (X = Mg, Fe or Ca) (Y = Al else Fe3+ or Cr) |
Jadeite | NaAlSi2O6 |
Nephrite | Ca2(MgFe)5(Si4O11)2 |
Topaz | Al2SiO4(FOH)2 |
Tourmaline | (Na1+, Ca2+)(Li1+, Mg2+, Al3+). (Al3+, Fe3+, Mn3+)6(BO3)3 (Si6O18) (OH)4 |
Peridot | Mg2SiO4, Fe2SiO4 |
Zircon | Zr(SiO4) |