Class VII: Phosphates
From The Gemology Project
| Class VII | Phosphates |
|---|---|
| Amblygonite | LiAl(F,OH/PO4) |
| Apatite | Ca5(F/PO4)2 |
| Brazilianite | NaAl3(OH2/PO4)2 |
| Turquoise | CuAl6((OH2)PO4)44H20 |
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