Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| Kellyite | (MnII,Mg,Al)3(Si,Al)2O5(OH)4 | Serpentine (subgroup) | — | 0 | 0 | — | Mineral, Aluminosilicate , Hydroxide | |
| Kenoplumbomicrolite | (Pb,☐)2Ta2O6[☐,(OH),O] | Microlite (group) | — | 0 | 0 | — | Mineral, Hydroxide | |
| Keplerite | Ca9(Ca0.5☐0.5)Mg(PO4)7 | Merrillite (subgroup) | — | 0 | 0 | — | Mineral, Orthophosphate , Phosphate | |
| Khibinskite | K2ZrSi2O7 | — | — | 3 | 0 | — | Mineral, Silicate | |
| Khvorovite | Pb4Ca2[Si8B2(SiB)O28]F | Hyalotekite (group) | — | 0 | 0 | — | Mineral, Halide , Borosilicate | |
| Kintoreite | PbFeIII3(PO4)(PO3OH)(OH)6 | Plumbogummite (group) | — | 0 | 0 | — | Mineral, Hydroxide , Orthophosphate , Phosphate | |
| Kirschsteinite | CaFeII(SiO4) | Olivine | — | 0 | 0 | — | Mineral, Silicate | |
| Klöchite | (FeIIFeIII)☐2KZn3(Si12O30) | Osumilite (group) | — | 0 | 0 | — | Mineral, Silicate | |
| Knorringite | Mg3Cr2(SiO4)3 | Garnet | — | 0 | 0 | — | Mineral, Silicate | |
| Kokchetavite | K(AlSi3O8) | Alkali feldspar | — | 0 | 0 | — | Mineral, Aluminosilicate | |
| Kosmochlor | NaCrIIISi2O6 | Clinopyroxene | — | 0 | 0 | — | Mineral, Silicate | |
| Kostylevite | K2ZrSi3O9·H2O | — | — | 0 | 0 | — | Hydrated , Mineral, Silicate | |
| Kratochvilite | C13H10 | — | — | 0 | 0 | — | Mineral, Duplicate , Organic | |
| Kratochvílite | (C6H4)2CH2 | — | — | 1 | 0 | — | Mineral, Organic | |
| Krut'aite | CuSe2 | Pyrite (group) | — | 0 | 0 | — | Mineral, Selenide |