Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| K feldspar | KAlSi3O8 | Alkali feldspar | Adularia, Orthoclase, Microcline | 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 | |
| Kanonaite | MnIIIAlOSiO4 | Andalusite (subgroup) | — | 0 | 0 | — | Mineral, Aluminosilicate | |
| Kaolinite | Al2Si2O5(OH)4 | Kaolinite (subgroup) | — | 12 | 1 | Reflectance | Mineral, Aluminosilicate , Hydroxide | |
| Kaolinite (subgroup) | Al2Si2O5(OH)4 | Kaolinite-Serpentine Group | Kaolinite, Dickite, Halloysite, Nacrite | 5 | 0 | — | Hydroxide, Aluminosilicate , Subgroup | |
| Kaolinite-Serpentine Group | — | — | Serpentine (subgroup), Manandonite, Odinite, Greenalite, Kaolinite (subgroup) | 0 | 0 | — | Group , Hydroxide , Silicate | |
| Kapitsaite-(Y) | Ba4Y2Si8B4O28F | Hyalotekite (group) | — | 6 | 0 | — | Mineral, Borosilicate | |
| Karelianite | V2O3 | Hematite (group) | — | 0 | 0 | — | Mineral, Simple oxide | |
| Karpatite | C24H12 | — | — | 0 | 0 | — | Organic | |
| Keilite | FeS | — | — | 0 | 0 | — | Mineral, Sulphide | |
| Keldyshite | Na2-xHxZrSi2O7·n(H2O) | — | — | 1 | 0 | — | Mineral, Silicate , Hydrated |
