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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
Kernite: Na2B4O6(OH)2·3(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