Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| Wadeite | K2ZrSi3O9 | Benitoite (group) | — | 3 | 0 | — | Mineral, Silicate | |
| Wadsleyite | Mg2SiO4 | — | — | 0 | 0 | — | Mineral, Silicate | |
| Wakefieldite-(Ce) | CeVO4 | Xenotime (group) | — | 0 | 0 | — | Mineral, Vanadate | |
| Wakefieldite-(La) | LaVO4 | Xenotime (group) | — | 0 | 0 | — | Mineral, Vanadate | |
| Wakefieldite-(Nd) | NdVO4 | Xenotime (group) | — | 0 | 0 | — | Mineral, Vanadate | |
| Wakefieldite-(Y) | YVO4 | Xenotime (group), Yttrium orthovanadate | — | 10 | 1 | CL/SEM | Mineral, Vanadate | |
| Wangdaodeite | FeTiO3 | — | — | 0 | 0 | — | Mineral, Titanate | |
| Water | H2O | — | — | 3 | 0 | — | Simple oxide , Compound | |
| Wavellite | Al3(PO4)2(OH)3·5H2O | — | — | 0 | 0 | — | Mineral, Hydroxide , Hydrated , Phosphate , Orthophosphate | |
| Waylandite | BiAl3(PO4)2(OH)6 | Plumbogummite (group) | — | 0 | 0 | — | Mineral, Hydroxide , Orthophosphate , Phosphate | |
| Whewellite | Ca(C2O4)·H2O | — | — | 3 | 0 | — | Hydrated , Mineral , Organic | |
| White mica | — | Mica | — | 5 | 0 | — | Aluminosilicate , Informal | |
| Whitlockite | Ca9Mg(PO3OH)(PO4)6 | Whitlockite (subgroup) | — | 0 | 0 | — | Mineral, Hydroxide , Orthophosphate , Phosphate | |
| Whitlockite (subgroup) | — | Cerite (group) | Wopmayite, Hedegaardite, Strontiowhitlockite, Whitlockite | 0 | 0 | — | Subgroup | |
| Willemite | Zn2SiO4 | Phenakite (group) | — | 3 | 1 | CL/SEM | Mineral, Silicate |
