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Kulanite: Ba(Fe++,Mn,Mg)2Al2(PO4)3(OH)3
Comments: White apatite crystals to 0.5 cm in length and abundant, bladed, deep olive green crystals (see inset image) of kulanite. Location: Rapid Creek, Yukon Territory, Canada. Scale: 4.3 x 3.2 cm. © John Veevaert
Kuliokite-(Y): (Y,REE)4Al(SiO4)2(OH)2F5
Comments: White encrustations of kuliokite-(Y) grains on pegmatite. Location: Ploskaya Mt., Western Keivy, Kola Peninsula, Russia. Scale: Specimen Size 14x10x8 mm. © Sergey Vasiliev / Systematic Mineralogy
Kumtyubeite: Ca5(SiO4)2F2 Srebrodolskite: Ca2Fe+++2O5 Wadalite: Ca6Al5Si2O16Cl3 Rondorfite: Ca8Mg(SiO4)4Cl2
Comments: BSE image of kumtyubeite (Kmt) associated with srebrodolskite (Srb), bultfonteinite (Blt), Ca- kydrosilicates, wadalite (Wad), rondorfite (Rndr), and ettringite (dark gray). (AmMin, v94:1361). Location: Rock-forming mineral found in skarn carbonate-xenoliths in ignimbrites of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia. Scale: See Image. © American Mineralogist
Kupcikite: Cu3.4Fe0.6Bi5S10 Cuprobismutite: Cu10Bi12S23
Comments: Backscattered electron image of kupcíkite (ku) replacing cuprobismutite (cu); both phases are in turn replaced by bsimuthinite derivative (bd79-92). Location: Felbertal, Austria. Scale: Scale bar 100 µ-m. © Canadian Mineralogist
Kupletskite: K2Na(Mn,Fe++)7(Ti,Nb)2Si8O26(OH)4F
Comments: Bronze-colored stellate crystalline spray of kupletskite on white orthoclase. Location: 3M quarry, Little Rock, Pulaski County, Arkansas, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Kupletskite: K2Na(Mn,Fe++)7(Ti,Nb)2Si8O26(OH)4F Niobokupletskite: K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F)
Comments: Back-scattered electron image of Niobokupletskite (Nkpt) rimming kupletskite (Kpt). The zoning in the kupletskite is from Nb-poor to Nb-rich in the direction of the arrow (dark to medium gray). (CanMin v 38, p 628). Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Scale bar 100 µ-m. © Canadian Mineralogist
Kupletskite-(Cs): (Cs,K)2Na(Mn,Fe++,Li)7(Ti,Nb)2Si8O26(OH)4F Tienshanite: BaNa2MnTiB2Si6O20
Comments: Dark olive-green colored crystalline tienshanite with cesium-kupletskite in microcline. Location: Dara-Pioz, Tien-Shan, Tadzhikistan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kuranakhite: PbMn++++Te++++++O6
Comments: Reddish-brown kuranakhite on matrix. Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Kurchatovite: Ca(Mg,Mn,Fe++)B2O5
Comments: Gray crystalline kurchatovite (arrow) in matrix (distinguishable by violet fluorescence). Location: Solongo, Republic of Buryatia, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kurgantaite: CaSr[B5O9]Cl·(H2O)
Comments: Crystal fragment of white kurgantaite on sticky stuff. Location: Korshunovskoye Deposit, Transbaikal, Irkutsk District, Russia. Scale: Specimen Size 6x3x2 mm. © Sergey Vasiliev / Systematic Mineralogy
Kurilite: (Ag,Au)2(Te,Se,S) Hessite: Ag2Te
Comments: Metallic crystal of hessite on matrix. Hessite is also known as kurilite. Location: Botes, Zlatna, Transylvania, Romania. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Kurnakovite: MgB3O3(OH)5·5(H2O)
Comments: Very pale lilac-colored crystal of kurnakovite. Location: Boron, Kramer District, Kern County, California, USA. Scale: 7.2x4x2.5 cm. © Richard Dale / Dale Minerals
Comments: Chalky white outer alteration, else gray, translucent, coarsely-crystalline kurnakovite. Location: The Open Pit, Boron, Kern Co., California, USA. Scale: 5x4x3cm. © Tom Loomis / Dakota Matrix
Kusachiite: CuBi2O4
Comments: Black kusachiite with blue henmilite. Location: Fuka, Bicchu-cho, Okayama Prefecture, Japan. Scale: Picture Size 0.5 mm. © Thomas Witzke
Kutnohorite: Ca(Mn,Mg,Fe++)(CO3)2
Comments: Light-pinkish, parallel bundles of kutnohorite crystals on matrix. Location: Wessels mine, Hotazel, Kuruman District, South Africa. Scale: 5 x 4.7 x 3 cm. © Fabre Minerals
Kuzmenkoite-Mn: (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O)
Comments: Yellowish brown kuzmenkoite-Mn crystals on matrix, with smaller, more brown colored labuntsovite-Mn. Location: Mnt Flora, Lovozero, Kola, Russia. Scale: Sample Size 2x3 cm. © Diederik Visser
Kuzmenkoite-Mn: (K,Na)2(Mn,Fe)(Ti,Nb)4[Si4O12]2(OH)4·5(H2O) Calciohilairite: CaZrSi3O9·3(H2O)
Comments: White rhombododecahedral crystals of calciohilairite associated with orange=brown stout prismatic kuzmenkoite-Mn on matrix. Location: Flora Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: FOV ~1x1 cm. © Pavel M. Kartashov
Kyanite: Al2SiO5 = Al[6]Al[6]OSiO4
Comments: Two terminated, bright blue crystals of kyanite in a white quartz matrix. Location: Barra do Salinas, Minas Gerais, Brazil. Scale: 9.5 x 4 x 4 cm. © Isaias Casanova / IC Minerals
Comments: Cluster of 4, green, gemmy, fluorescent blades of kyanite. Location: Pech, Afghanistan. Scale: 1.7 x 1.0 x 0.3 cm. © Kieth Hayes
Kyanoxalite: Na7(Al5-6Si6-7O24)(C2O4)0.5-1.0·5H2O
Comments: Small aggregate of white kyanoxalite crystals in matrix. Location: Karnasurt Mt. Lovozero Massif, Kola Peninsula, Russia. Scale: Sample Size 15x8x6 mm. © Sergey Vasiliev / Systematic Mineralogy