Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| Jadeite | NaAlSi2O6 | Clinopyroxene | — | 23 | 2 | CL, CL/SEM | Mineral, Aluminosilicate | |
| Jerrygibbsite | MnII9(SiO4)4(OH)2 | Leucophoenicite (subgroup) | — | 0 | 0 | — | Mineral, Hydroxide , Silicate | |
| Jervisite | NaScIIISi2O6 | Clinopyroxene | — | 0 | 0 | — | Mineral, Silicate | |
| Jimboite | MnII3(BO3)2 | — | — | 1 | 0 | — | Mineral, Borate | |
| Jingsuiite | TiB2 | Titanium diboride | — | 0 | 0 | — | Mineral, Boride | |
| Johannsenite | CaMnSi2O6 | Clinopyroxene | — | 0 | 0 | — | Mineral, Silicate | |
| Johnbaumite | Ca5(AsO4)3(OH) | Apatite (group) | — | 0 | 0 | — | Arsenate , Mineral, Hydroxide | |
| Johnkoivulaite | Cs[Be2B]Mg2Si6O18 | Beryl (group) | — | 0 | 0 | — | Mineral, Silicate | |
| Jordisite | MoS2 | — | — | 0 | 0 | — | Mineral, Sulphide | |
| K feldspar | KAlSi3O8 | Alkali feldspar | Orthoclase, Microcline, Adularia | 3 | 3 | CL, EDS | Aluminosilicate , Silicate, Group , Informal | |
| K-496 glass | P2O5-MgO-Al2O3 | — | — | 0 | 0 | — | Phosphate | |
| Kahlerite | FeII(UO2)2(AsO4)2·12H2O | Autunite (group) | — | 0 | 0 | — | Hydrated , Mineral, Uranyl , Arsenate | |
| Kaliophilite | KAlSiO4 | — | — | 0 | 0 | — | Mineral, Aluminosilicate | |
| Kalsilite | KAlSiO4 | Feldspathoid (group) | — | 0 | 0 | — | Mineral, Aluminosilicate | |
| Kanoite | MnMgSi2O6 | Clinopyroxene | — | 0 | 0 | — | Mineral, Silicate |
