Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| Chrysotile | Mg3Si2O5(OH)4 | Serpentine (subgroup) | — | 0 | 0 | — | Mineral, Hydroxide , Silicate | |
| Chukhrovite-(Ce) | Ca3CeAl2(SO4)F13·12H2O | — | — | 7 | 0 | — | Hydrated , Mineral, Halide , Sulphate | |
| Churchite-(Y) | Y(PO4)·2H2O | Gypsum (supergroup) | — | 0 | 0 | — | Hydrated , Mineral, Orthophosphate , Phosphate | |
| Cinnabar | HgS | Mercury sulphide | — | 12 | 1 | CL/SEM | Mineral, Sulphide | |
| Ciprianiite | Ca4(ThCa)Σ2Al(Be0.5☐1.5)Σ2[B4Si4O22](OH)2 | Hellandite (group) | — | 0 | 0 | — | Mineral, Hydroxide , Borosilicate | |
| Citrine | SiO2 | Quartz | — | 0 | 0 | — | Variety , Simple oxide | |
| Clarkeite | (Na,Ca,Pb)(UO2)O(OH)·0-1(H2O) | — | — | 5 | 0 | — | Uranyl , Mineral, Hydroxide , Hydrated | |
| Clausthalite | PbSe | Lead selenide, Galena (group) | — | 0 | 0 | — | Mineral, Selenide | |
| Clino-suenoite | ☐MnII2Mg5Si8O22(OH)2 | Suenoite root name group | — | 0 | 0 | — | Mineral, Hydroxide , Silicate | |
| Clinoamphibole | — | Amphibole | — | 2 | 0 | — | Variety, Informal | |
| Clinocervantite | SbIIISbVO4 | — | — | 0 | 0 | — | Mineral, Mixed oxide | |
| Clinochlore | Mg5Al(AlSi3O10)(OH)8 | Chlorite (group) | — | 2 | 0 | — | Mineral, Aluminosilicate , Hydroxide | |
| Clinochrysotile | Mg3Si2O5(OH)4 | — | — | 2 | 0 | — | Hydroxide , Silicate | |
| Clinoenstatite | Mg2Si2O6 | Clinopyroxene | — | 0 | 0 | — | Mineral, Silicate | |
| Clinoferrosilite | FeII2Si2O6 | Clinopyroxene | — | 0 | 0 | — | Mineral, Silicate |
