 Cyclosilicates
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Name: Benitoite
Formula: BaTiSi3O9
Locality: California, USA
Size: 3 cm
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Name: Beryl
Formula: Be3Al2Si6O18
Locality: Minas Gerais, Brazil
Size: 4.5 cm |
Name: Aquamarine
Formula: Be3Al2Si6O18
Locality: Brazil
Size: 10 cm
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Name: Emerald
Formula : Be3Al2Si6O8
Locality: Bagota, Columbia
Size: 3 cm |
Name: Tourmaline (var. Elbaite)
Formula: Na(Li,Al)3Al6(BO3)3[Si6O18](OH)3(OH)
Locality: Sahatany Valley, Madagascar
Size: 8 cm
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Name: Tourmaline
Formula: NaMg3Al6(BO3)3[Si6O18](OH)3(OH)
Locality: Australia
Size: 5 cm |
Name: Cordierite
Formula : (Mg,Fe)2Al4Si5O18
Locality: Russia
Size: 15 cm
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Name: Dioptase
Formula: CuSiO2(OH)2
Locality: Congo, Africa
Size: 5 cm
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Name: Eudialyte
Formula:
Na15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2
Locality: Québec, Canada
Size: 10 cm
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