Kaatialaite, Kaersutite, Kainite, Kalinite, Kambaldaite, Kamiokite, Kampfite, Kankite, Kanoite, Kaolinite, Karlite, Kassite, Kegelit, Kermesite, Kernite, Kesterite, Keyite, Knebelite, Knorringite, Kogarkoite, Kolbeckite, Kornerupine, Kosmochlor, Kostovite, Kottigite, Kovdorskite, Kremersite, Krennerite, Krohnkite, Krutovite, Kukharenkoite, Kunzite, Kyanite
