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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
Kolwezite: (Cu,Co)2(CO3)(OH)2
Comments: Green kolwezite cotton balls on pink cobaltian calcite. Location: Musononi mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Komarovite: (Ca,Mn)2(Nb,Ti)2Si2O7(O,F)2·3.5(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
Kombatite: Pb14(VO4)2O9Cl4 Hausmannite: Mn++Mn+++2O4
Comments: Yellow kombatite crystals in black hausmannite. Location: Kombat Mine, Otavi, Namibia. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Koninckite: Fe+++PO4·3(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)2·5(H2O)
Comments: white powdery konyaite. Location: Great Konya Basin, Konya, Turkey. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Koragoite: (Mn++,Fe+++)3(Nb,Ta,Ti)2(Nb,Mn)2(W,Ta)2O20
Comments: Black tabular crystals of koragoite in matrix. Location: Vez-Dara River Valley, Shakhdara Range, Khorog Region, Gorno-Badakhshan District, Pamir Mts, Tajikistan. Scale: Picture size 1.8 mm. © Thomas Witzke / Abraxas-Verlag
Koritnigite: ZnHAsO4·(H2O)
Comments: Translucent nearly colorless fragment of koritnigite. Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kornelite: Fe+++2(SO4)3·7(H2O)
Comments: Sulfate matrix with several 1 cm sprays of kornelite. This specimen has to be protected from air as it is readily soluble in water. Location: Rio Tinto Mine, Huelva, Spain. Scale: Picture size 1 cm. © John Veevaert