Class VIII: Silicates

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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)