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Kernite: Na2B4O6(OH)2ˇ3(H2O)
Comments: Translucent kernite cleavage prism with white superficial dehydration coating. Location: Pacific Coast Boron Mine, Boron, Kern County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kerstenite: PbSeO4 (?) Clinochalcomenite: CuSeO3ˇ2(H2O) Krutaite: CuSe2
Comments: Tan opaque fibrous kerstenite with possible blue clinochalcomenite on dark krutaite. Location: Mina El Dragon, Potosi, Bolivia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Khademite: Al(SO4)Fˇ5(H2O)
Comments: Pale blue botryoidal khademite on matrix. Location: Bergmann Liegendes, Rammelsberg, Harz Mountains, Niedersachsen, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kieserite: MgSO4ˇ(H2O)
Comments: Translucent crystalline mass of kieserite with white alteration products. Location: Stassfurt, Sachsen-Anhalt, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kintoreite: PbFe+++3(PO4)2(OH,H2O)6
Comments: Yellow rounded crystal grains of kintoreite on limonite. Location: Kintore Open Cut, Broken Hill, New South Wales, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
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
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
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
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
Kochsandorite: CaAl2(CO3)2(OH)4ˇH2O
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
Kogarkoite: Na3(SO4)F
Comments: Pale green granular mass of kogarkoite with yellow native sulfur. Location: Vulcano, Sicily, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Koktaite: (NH4)2Ca(SO4)2ˇ(H2O)
Comments: Tan to white scaly coating of koktaite. Location: Zastavka, near Brna, Vychodocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kolicite: Mn7Zn4(AsO4)2(SiO4)2(OH)8
Comments: Minute orange crystal of kolicite in franklinite. Location: Sterling Mine, Ogdensburg, Sussex County, New Jersey, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kolovratite: Hydrous vanadate of Ni and Zn
Comments: Aqua-colored botryoidal crust of kolovratite. Location: Mina Ojuela, Mapimi, Durango, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Komarovite: (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2ˇ3.5(H2O)
Comments: Pale pink crystalline komarovite vein in syenite rock. Location: Mount Karnasurt, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Koninckite: Fe+++PO4ˇ3(H2O) (?)
Comments: Pale pink botryoidal crust of koninckite on rock. Location: Richelle, Liege, Belgium. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Konyaite: Na2Mg(SO4)2ˇ5(H2O)
Comments: white powdery konyaite. Location: Great Konya Basin, Konya, Turkey. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Koritnigite: ZnHAsO4ˇ(H2O)
Comments: Translucent nearly colorless fragment of koritnigite. Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species