| Wairauite | CoFe |
| Waverllite | Al3(PO4)2(OH,F)3.5H2O |
| Weishanite | (Au,Ag)3Hg2 |
| Weloganite | Na2(Sr,Ca)3Zr(CO3)6.3H2O |
| Whewellite | CaC2O4.H2O |
| Willemite | Zn2SiO4 |
| Willyamite | (Co,Ni,Sb,S) |
| Witherite | BaCO3 |
| Wittichenite | (Cu,Bi,S) |
| Wittite | (Pb,Bi,Se,S) |
| Wollastonite | CaSiO3 |
| Wulfenite | PbMoO4 |
| Wurtzite | (Zn,Fe)S |