| Kaatialaite (A) | Kermesite (G) | Koninckite (G) |
| Kadyrelite (A) | Kernite (G) | Konyaite (A) |
| Kaersutite (R) | Kerolite (Q) | Koragoite (A) |
|
Kafehydrocyanite (N) |
Kerstenite (Q) | Koritnigite (A) |
| Kahlerite (G) | Kësterite (G) | Korkinoite (N) |
| Kainite (G) | Kettnerite (G) | Kornelite (G) |
| Kainosite-(Y) (A) | Keyite (A) | Kornerupine (G) |
| Kalborsite (A) | Keystoneite (A) | Kornite (A) |
| Kaliborite (G) | Khademite (R) | Korobitsynite (A) |
| Kalicinite (G) | Khaidarkanite (A) | Korshunovskite (A) |
| Kalifersite (A) | Khamrabaevite (A) | Korzhinskite (N) |
| Kalininite (A) | Khanneshite (A) | Kosmochlor (A) |
| Kalinite (G) | Kharaelakhite (A) | Kosnarite (A) |
| Kaliophilite (G) | Khatyrkite (A) | Kostovite (A) |
| Kalipyrochlore (A) | Khibinskite (A) | Kostylevite (A) |
| Kalistrontite (G) | Khinite (A) | Kotoite (G) |
| Kalsilite-1H (G) | Khmaralite (A) | Köttigite (G) |
| Kalsilite-1T (G) | Khomyakovite (A) | Kotulskite (G) |
| Kaluginite (N) | Khristovite-(Ce) (A) | Koutekite (G) |
| Kamacite (G) | Kiddcreekite (A) | Kovdorskite (A) |
| Kamaishilite (A) | Kidwellite (A) | Kozoite-(La) (A) |
| Kambaldaite (A) | Kieftite (A) | Kozoite-(Nd) (A) |
| Kamchatkite (A) | Kieserite (G) | Kôzulite (R) |
| Kamiokite (A) | Kilchoanite (G) | Kraisslite (A) |
| Kamitugaite (A) | Killalaite (A) | Krasnogorite (N) |
| Kamotoite-(Y) (A) | Kimrobinsonite (A) | Krasnoselskite (N) |
| Kampfite (A) | Kimuraite-(Y) (A) | Krasnovite (A) |
| Kamphaugite-(Y) (A) | Kimzeyite (G) | Kratochvilite (G) |
| Kanemite (A) | Kingite (G) | Krausite (G) |
| Kankite (A) | Kingsmountite (A) | Krauskopfite (A) |
| Kanoite (A) | Kinichilite (A) | Krautite (A) |
| Kanonaite (A) | Kinoite (A) | Kremersite (G) |
| Kanonerovite (A) | Kinoshitalite (A) | Krennerite (G) |
| Kaolinite-1A (G) | Kintoreite (A) | Krettnichite () |
| Kaolinite-1M (P) | Kipushite (A) | Kribergite (G) |
| Kapitsaite-(Y) (A) | Kirchheimerite (N) | Krinovite (A) |
| Karasugite (A) | Kirkiite (A) | Kristiansenite (A) |
| Karelianite (G) | Kirschsteinite (G) | Kröhnkite (G) |
| Karibibite (A) | Kitaibelite (N) | Krupkaite (A) |
| Karlite (A) | Kitkaite (G) | Krutaite (A) |
| Karnasurtite-(Ce) (A) | Kittatinnyite (A) | Krutovite (A) |
| Karpatite (G) | Kittlite (N) | Kryzhanovskite (G) |
| Karpinskite (Q) | Kladnoite (G) | Ktenasite (G) |
| Karupmøllerite-Ca (A) | Klebelsbergite (R) | Kukharenkoite-(Ce) (A) |
| Kashinite (A) | Kleemanite (A) | Kukisvumite (A) |
| Kasolite (G) | Kleinite (G) | Kuksite (A) |
| Kassite (G) | Kliachite (Q) | Kulanite (A) |
| Kastningite (A) | Klockmannite (G) | Kuliokite-(Y) (A) |
| Katangaite (Q) | Klyuchevskite (A) | Kulkeite (A) |
| Katayamalite (A) | Knorringite (A) | Kullerudite (G) |
| Katoite (A) | Koashvite (A) | Kupletskite (G) |
| Katophorite (R) | Kobeite-(Y) (A) | Kuramite (A) |
| Katoptrite (G) | Kobellite (G) | Kuranakhite (A) |
| Kawazulite (A) | Kochite (A) | Kurchatovite-1M (P) |
| Kazakhstanite (A) | Kochkarite (A) | Kurchatovite-3O (A) |
| Kazakovite (A) | Koechlinite (G) | Kurgantaite (R) |
| Keckite (A) | Koenenite (G) | Kurilite (N) |
| Kegelite (R) | Kogarkoite (A) | Kurnakovite (G) |
| Keilite (A) | Koivinite-(Y) (Q) | Kurumsakite (Q) |
| Keithconnite (A) | Koktaite (G) | Kusachiite (A) |
| Keiviite-(Y) (A) | Kolarite (A) | Kutínaite (A) |
| Keiviite-(Yb) (A) | Kolbeckite (A) | Kutnahorite (G) |
| Keldyshite (G) | Kolfanite (A) | Kuzelite (A) |
| Kellyite (A) | Kolicite (A) | Kuzmenkoite-Mn (R) |
| Kelyanite (A) | Kolovratite (Q) | Kuzmenkoite-Zn (A) |
| Kemmlitzite (R) | Kolwezite (A) | Kuzminite (A) |
| Kempite (G) | Kolymite (A) | Kuznetsovite (A) |
| Kenhsuite (A) | Komarovite (A) | Kvanefjeldite (A) |
| Kentbrooksite (A) | Kombatite (A) | Kyanite (G) |
| Kentrolite (G) | Komkovite (A) | Kyzylkumite (A) |
| Kenyaite (A) | Konderite (A) |