Mineral Specimen Images (K)

Keilite: (Fe,Mn,Mg,Ca,Cr)S

Comments: B&W polished section image (a) of keilite (Ke) with troilite/pyrrhotite (Tro/Pyr) and metal (FeNi); gray, mostly oval grains are enstatite (En) and somewhat darker interstices are feldspars (Pl). (AmMin, v92:206).
Location: Zak?odzie enstatite achondrite. Scale: See Image.
© American Mineralogist

Keithconnite: Pd3-xTe(x=0.14 to 0.43)  
Kotulskite: Pd(Te,Bi)  
Telluropalladinite: Pd9Te4

Comments: Polyphase grain of (1) ferroan platinum corroded by (2) Pt(Fe,Cu) and overgrown by (5) telluropalladinite, an unknown (6) Pd-Te-Fe-Si-O phase, (7) Fe-hydroxide and (8) a Ca-Mn-Fe silicate with inclusions of (3) kotulskite and (4) keithconnite. (BGR).
Location: Stream sediments of rivers in the vicinity of the original discovery of the Merensky Reef on the farm Maandagshoek close to Burgersfort in the Eastern Bushveld, South Africa.. Scale: See Image.
© Federal Institute for Geosciences and Natural Resources

Keiviite-(Yb): (Yb,Y)2Si2O7

Comments: White massive blebs of keiviite-(Yb) in blue-green fluorite.
Location: Mount Ploskaja, west Keivy, Kola, Russia. Scale: See Image.
© Rruff Database

Keldyshite: Na2-xHxZrSi2O7·n(H2O)

Comments: Gray-white chalk-like keldyshite in and on matrix.
Location: Langdalen, Vestfold, Norway. Scale: Specimen Size 5x7 cm.
© Diederik Visser

Kellyite: (Mn++,Mg,Al)3(Si,Al)2O5(OH)4

Comments: Light-yellow irregular to platy tablets of kellyite in matrix.
Location: Near Bald Knob, Alleghany County, North Carolina, USA. Scale: See Image.
© Rruff Database

Kelyanite: (Hg+2)6(SbO6)BrCl2

Comments: B&W BSE image of an epoxy grain mount of kelyanite (1) and calomel (2) fragment.
Location: Kelyan Sb-Hg mine, Buryatia, Siberia, Russia. Scale: See Image.
© Diederik Visser

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

Kentrolite: Pb2Mn+++2Si2O9

Comments: Brownish red grains of kentrolite in matrix.
Location: Langban mine, Varmland, Sweden. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

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

Kermesite: Sb2S2O

Comments: Reddish brown radiating spray of kermesite crystals on matrix.
Location: Pezinok (Pernek), near Bratislava, Solvakia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Kermesite: Sb2S2O  
Paakkonenite: Sb2AsS2

Comments: Much of the matrix is the gray metallic paakkonenite with red crystals of kermesite and minute yellow crystals of valentinite.
Location: Cai' ao mine, Danfong Co., Shaanxi Prov., China. Scale: 3x2x2cm.
© Tom Loomis / Dakota Matrix

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

Kerstenite: PbSeO4 (?)  
Clinochalcomenite: CuSeO3·2(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

Kesterite: Cu2(Zn,Fe)SnS4  
Mushistonite: (Cu,Zn,Fe)Sn++++(OH)6

Comments: Sharp, kesterite crystal, greenish in color due to a mushistonite coating with clear, prismatic beryl crystals.
Location: Xue Bao Diang Mountains, north of Pingwu, Sichuan Province, China. Scale: Crystal size 1 cm.
© Dan Weinrich

Kettnerite: CaBi(CO3)OF

Comments: Brown crystals of kettnerite.
Location: Shaft 250, Schlema-Hartenstein area, Erzgebirge, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Keyite: Cu++3(Zn,Cu)4Cd2(AsO4)6·2(H2O)

Comments: Brilliant blue keyite crystals on a matrix of white, metallic suflide-arsenide ore.
Location: Tsumeb, Namibia. Scale: 0.9 x 0.7 x 0.7 cm.
© Rob Lavinsky

Keystoneite: Mg0.5[Ni++Fe++(TeO3)3]·4.5(H2O)

Comments: Yellow, feathery keystoneite on quartz.
Location: Mcalpine Mine, Moccasin, Tuolumne Co., California, USA. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Khademite: Al(SO4)F·5(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