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Kipushite: (Cu,Zn)5Zn(PO4)2(OH)6ˇ(H2O)
Comments: Prismatic emerald green microcrystals of kipushite on quartz. Location: Snowshoe Claim, near Battle Mountain, Lander County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kirschsteinite: CaFe++SiO4
Comments: Grayish green crystalline massive kirschsteinite. Location: Mazarron, Murcia, Spain. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kitaibelite: Ag10PbBi30S51 Pavonite: (Ag,Cu)(Bi,Pb)3S5
Comments: Steel-gray metallic massive pavonite (kitaibelite is discredited as Pb-bearing pavonite). Location: Near Charcas, San Luis Potosi, Mexico. Scale: See Image. © Rruff Database
Kitkaite: NiTeSe Penroseite: (Ni,Co,Cu)Se2 Sederholmite: NiSe
Comments: B&W polished section image showing kitkaite replacing calcite in penroseite, clausthalite and sederholmite. Note the absence of the clausthalite envelope around kitkaite.. Location: Valley of the Kitka river in Kuusamo, northeast Finland. (AmMin, v50:581). Scale: 100 X. © American Mineralogist
Kivuite: (Th,Ca,Pb)H2(UO2)4(PO4)2(OH)8ˇ7(H2O) Dewindtite: Pb3[H(UO2)3O2(PO4)2]2ˇ12(H2O)
Comments: Pale yellow coatings of kivuite with yellowier dewindtite on pegmatite. Location: Ruggles Mine, Grafton, Grafton County, New Hampshire, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kladnoite: C6H4(CO)2NH
Comments: Glassy prismatic colorless kladnoite crystals on matrix. Location: Kladno, Stredocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Klebelsbergite: Sb+++4O4(OH)2(SO4)
Comments: Small, acicular sprays of klebelsbergite with yellow crystals of sulfur on stibnite. Location: Pereta Mine, Grosseto Province, Tuscany, Italy. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Kleinite: Hg2N(Cl,SO4)ˇn(H2O)
Comments: Crystalline druse of bright canary yellow kleinite on matrix. Location: McDermmitt, Humboldt County, Nevada. USA. Scale: Crystal size 1-2 mm. © John Veevaert
Klockmannite: CuSe
Comments: Klockmannite intergrown with covellite on quartz. Location: Lichtenberg Mine, Ronneburg U Deposit, Gera district, Thuringia, Germany. Scale: Picture size 7.5 mm. © Thomas Witzke / Abraxas-Verlag
Klockmannite: CuSe Fischesserite: Ag3AuSe2
Comments: Pinkish-grey fischesserite (Fl) with fine-grained bluish-grey klockmannite (Kl) and grey clausthalite (Cl). Polished section from microprobe analysis in reflected light, parallel nicols. Location: Predborice, Bohemia, Czech Republic. Scale: Picture size 0.7 mm. © Thomas Witzke
Klyuchevskite: K3Cu3(Fe+++,Al)O2(SO4)4 Klyuchevskite-Duplicate: K3Cu3Fe+++O2(SO4)4
Comments: Clusters of dark green radiating prismatic klyuchevskite crystals associated with langbeinite, co-type sample. Klyuchevskite-duplicate is the same mineral with different Dana numbers. Location: Yadevitaya fumarole, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: See Image. © Rruff Database
Klyuchevskite-Duplicate: K3Cu3Fe+++O2(SO4)4 Klyuchevskite: K3Cu3(Fe+++,Al)O2(SO4)4
Knasibfite: K3Na4[SiF6]3[BF4]
Comments: SEM image of knasibfite crystals (CanMin; v46:449). Location: La Fossa crater, Vulcano Island, Aeolian Archipelago, Sicily, Italy. Scale: See Image. © Canadian Mineralogist
Koashvite: Na6(Ca,Mn)(Ti,Fe)Si6O18ˇ(H2O)
Comments: Brown translucent crystalline fragment of koashvite. Location: Mount Koashva, Khibiny Massive, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kobeite-(Y): (Y,U)(Ti,Nb)2(O,OH)6 (?)
Comments: Subparallel aggregate of black, tabular, euhedral kobeite-(Y) crystals in matrix. Location: Ohro, Kobe, Kyoto, Japan. Scale: Picture size 5 mm. © Paul M. Schumacher
Kobellite: Pb22Cu4(Bi,Sb)30S69
Comments: Dark gray metallic crystalline kobellite with quartz. Location: Crabtree Quarry, Raleigh, Wake County, North Carolina, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kochkarite: PbBi4Te7
Comments: Bright silvery veinlets of kochkarite throughout matrix. Location: Kochkar' Au deposit, Plast, Urals Region, Russia. Scale: Overall: 2.5 x 2 x 1.5 cm. © Tom Loomis / Dakota Matrix
Kochsandorite: CaAl2(CO3)2(OH)4ˇH2O
Comments: Pearly circles of radiating white microcrystals of kochsandorite on coal. Location: Many coal deposit, Bicske-Zsambeki Basin, Tatabanya. Scale: 2.5x1.7x1.1 cm. © Richard Dale / Dale Minerals
Comments: White fibers of kochandorite on coal-marl matrix. Location: Mány coal field, Tatabánya, Hungary. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species
Koechlinite: Bi2MoO6
Comments: Greenish yellow crystal of koechlinite on quartz. Location: Adam Heber Mine, Neustädtel, Schneeberg district, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag