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Kalicinite: KHCO3
Comments: Tan crystalline kalicinite on bobierrite. Location: Khibiny Massif, Kola Peninsula, Russia. Scale: Picture Size 5 mm. © Jeff Weissman / Photographic Guide to Mineral Species
Kaliophilite: KAlSiO4 Meionite: Ca4Al6Si6O24CO3
Comments: Tan to white fibrous kaliophilite crystal bundle with white translucent meionite on matrix. Location: Mont Somma, Naples, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kalipyrochlore: (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K)
Comments: Opaque yellowish green to tan octahedral crystal of kalipyrochlore. Location: Lueshe, Nord-Kivu, Zaire. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kamacite: alpha-(Fe,Ni) Troilite: FeS Cohenite: (Fe,Ni,Co)3C Taenite: gamma-(Fe,Ni)
Comments: Brown masses of troilite, with white cohenite, in kamacite/taenite matrix, in meteorite (polished section). Location: Meteor Crater, Canyon Diablo, Coconino County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kamacite: alpha-(Fe,Ni) Taenite: gamma-(Fe,Ni) Troilite: FeS
Comments: Polished and acid etched slice, with crust, illustrating Widmanstaaten lines, with taenite darker areas between kamacite crystals, with tarnished troilite inclusions, in fine octahedrite meteorite. Location: Gibeon Meteorite, found 1836, Great Namaqualand, Hardap, Namibia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kamiokite: Fe2Mo3O8
Comments: Dull dark gray-black sectile massive kamiokite. Location: Krupka, Severocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kamitugaite: PbAl(UO2)5(PO4)2(OH)9·9.5(H2O)
Comments: Yellow crystalline kamitugaite on matrix. Location: Kobokobo pegmatite, Lusungu River District, Sud-Kivu, Democratic Republic of Congo (Zaïre). Scale: Picture Size 0.7 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Kanemite: NaHSi2O5·3(H2O)
Comments: Yellowish white translucent micro spherical aggregate of kanemite. Location: Kanem, Chad. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
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
Karelianite: V2O3
Comments: Dark bluish-black granular karelianite. Location: Outokumpu, Pohjois-Karjala, Finland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
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
Katayamalite: (K,Na)Ca7Li3Ti2[Si6O18]2(OH,F)2
Comments: White katayamalite, in white albite, with brown sugilite. Inset image shows specimen under UV-SW light, albite (dull red), katayamalite (blue-white) and sugilite (non-fluorescent). Location: Iwagi Island, Inland Sea (Setonaikai), Ehime Prefecture, Japan. Scale: Specimen Size 2.5 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Kazakhstanite: Fe+++5V++++3V+++++12O39(OH)9·9(H2O)
Comments: Deep black sooty coatings of kazakhstanite on silicified rock. Location: Gold Quarry Mine, Carlin Trend, Eureka County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kemmlitzite: (Sr,Ce)Al3(AsO4)(SO4)(OH)6
Comments: Tan granular kemmlitzite in sand. Location: Kemmlitz Deposit, Oschatz, Sachsen, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kenhsuite: Hg3S2Cl2
Comments: Yellow crystalline kenhsuite on montmorillonite matrix (light sensitive). Location: McDermitt Mine, Humboldt County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kentbrooksite: (Na,REE)15(Ca,REE)6Mn++Zr3NbSi25O74F2·2(H2O)
Comments: Orange translucent crystals of kentbrooksite frozen in syenite rock. Location: Mount Alluiav, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Kenyaite: Na2Si22O41(OH)8·6(H2O)
Comments: Compact granular massive kenyaite possibly with other phases. Location: Lake Magadi, Rift Valley Province, Kenya. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species