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Garnets. A 3 2+ B 2 3+ (SiO 4 ) 3. B = Al: Pyralspite garnets . Mg 3 Al 2 (SiO 4 ) 3 : Pyrope Fe 3 Al 2 (SiO 4 ) 3 : Almandine Mn 3 Al 2 (SiO 4 ) 3 : Spessartite. A = Ca: Ugrandite garnets. Ca 3 Cr 2 (SiO 4 ) 3 : Uvarovite Ca 3 Al 2 (SiO 4 ) 3 : Grossularite
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Garnets A32+ B23+ (SiO4)3 B = Al: Pyralspite garnets Mg3 Al2 (SiO4)3: Pyrope Fe3 Al2 (SiO4)3: Almandine Mn3 Al2 (SiO4)3: Spessartite A = Ca: Ugrandite garnets Ca3 Cr2 (SiO4)3: Uvarovite Ca3 Al2 (SiO4)3: Grossularite Ca3 Fe2 (SiO4)3: Andradite