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Kanoite: (Mn++,Mg)2Si2O6
Comments: Brown, prismatic crystals of kanoite in matrix. Location: Tatehira, Oshima Peninsula, Hokkaido, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kanonaite: (Mn+++,Al)AlSiO5
Comments: Dark greenish black microcrystal of kanonaite in matrix. Location: Le Coreaux, near Salmchateau, Luxembourg, Belgium. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kaolinite: Al2Si2O5(OH)4 Ammonioalunite: (NH4)Al3(SO4)2(OH)6
Comments: White chalky ammonioalunite on darker kaolinite. Location: Schoeller Mine, Kladno, Stredocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kaolinite: Al2Si2O5(OH)4 Pianlinite:
Comments: Off-white colored minute pianlinite (kaolinite) fragment. Location: Pianling, China. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kaolinite: Al2Si2O5(OH)4
Comments: Authigenic kaolinite plates covering a quartz grain overgrown with authigenic quartz. SEM image of a core sample. Location: Unknown. Scale: Picture size 50 µ-m. © OMNI Laboratories, Inc
Kapustinite: Na5.5Mn0.25ZrSi6O16(OH)2
Comments: Purple-red kapustinite partly covered with white powdery newly formed thermonatrite with violet ussingite. Location: Palitra Pegmatite, Kedykverpakhk Mt., Lovozero, Kola, Russia. Scale: Specimen Size 0.3x1.2 cm. © Diederik Visser
Karchevskyite: [Mg18Al9(OH)54][Sr2(CO3,PO4)9(H2O,H3O)11]
Comments: Colorless hexagonal plates of karchevskyite, co-type material, associated with phlogopite, dolomite, pyrite, and magnetite. Location: Zheleznyi mine, Kovdor Massif, Kola Peninsula, Russia. Scale: See Image. © Rruff Database
Karelianite: V2O3
Comments: Dark bluish-black granular karelianite. Location: Outokumpu, Pohjois-Karjala, Finland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Karibibite: Fe+++2As+++4(O,OH)9
Comments: Orange yellow, radial sprays of karibibite on löllingite to 0.75mm. Location: Galileia, Minas Gerais, Brazil. Scale: picture size 5 mm. © Tom Loomis / Dakota Matrix
Karlite: (Mg,Al)6(BO3)3(OH,Cl)4
Comments: Pale lemon yellow colored translucent crystalline fragment of karlite. Location: Schlegeistal, Zillertaler Alpen, Tirol, Austria. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species