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Isocubanite Image

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Isocubanite: CuFe2S3  
Isochalcopyrite: Cu8Fe9S16

Comments: Polished section showing isocubanite (formerly isochalcopyrite) with exsolved chalcopyrite infilling and replacing cross-bedded turbiditic hydrothermally altered sandstone.
Location: Unit VI, Deep Copper Zone, Bent Hill Massive Sulfide Deposit, Middle Valley, Northern Juan de Fuca Ridge. Scale: See Image.
© National Resouces of Canada

Isoferroplatinum Image

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Isoferroplatinum: (Pt,Pd)3(Fe,Cu)  
Cuproiridsite: CuIr2S4

Comments: Gray equant crystal of cuproiridsite in light gray isoferroplatinum. Polished section (from microprobe analysis) in reflected light.
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.14 mm.
© Thomas Witzke / Abraxas-Verlag

Isoferroplatinum Image

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Isoferroplatinum: (Pt,Pd)3(Fe,Cu)

Comments: Irregularly shaped silver metallic nugget of isoferroplatinum with minor chromite.
Location: Fox Gulch, Goodnews Bay. Alaska, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Isoferroplatinum Image

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Isoferroplatinum: (Pt,Pd)3(Fe,Cu)  
Ruthenium: (Ru,Ir,Os)

Comments: Scanning electron micrograph of polished section of ruthenium nugget with isoferroplatinum inclusions.
Location: Miass River, Chelyabinsk District, Southern Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Isokite Image

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Isokite: CaMg(PO4)F

Comments: Pale brownish to brown isokite in quartz.
Location: Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Isomertieite Image

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Isomertieite: Pd11Sb2As2  
Arsenopalladinite: Pd8(As,Sb)3  
Gold: Au  
Bornite: Cu5FeS4

Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite. Polished section (from microprobe analysis) in reflected light.
Location: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia. Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag

Isovite Image

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Isovite: (Cr,Fe)23C6

Comments: Dark gray metallic grain of isovite.
Location: Verkhneivinsk, Sverdlovskaya Oblast', Urals Region, Russia. Scale: Grain size 0.7 mm.
© Thomas Witzke / Abraxas-Verlag

Iwakiite Image

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Iwakiite: Mn++(Fe+++,Mn+++)2O4

Comments: Back fine-grained granular iwakiite in pink rhodonite.
Location: Gazaisho Mine, Iwaki, Fukushima, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Iwashiroite-(Y) Image

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Iwashiroite-(Y): YTaO4

Comments: Polished section of an aggregate of minute iwashiroite-(Y) crystals. Some of the aggregates appear dark blue owing to internal reflections.
Location: Suishoyama, Kawamata Town, Fukushima Prefecture, Japan. (Journal of Mineralogical and Petrological Sciences, v101:170). Scale: See Image.
© JMPS

Ixiolite Image

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Ixiolite: (Ta,Nb,Sn,Mn++,Fe++)O2

Comments: Hemispherical crystalline aggregate of ixiolite.
Location: Muiane mine, Zambesia, Mozambique. Scale: Specimen size 1.3 cm.
© John Veevaert

Izoklakeite Image

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Izoklakeite: Pb27(Cu,Fe)2(Sb,Bi)19S57

Comments: Prismatic metallic gray microcrystal of izoklakeite (mounted on paper).
Location: Vena Mine, Bergslagen, Orebro, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jachymovite Image

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Jachymovite: (UO2)8(SO4)(OH)14·13(H2O)

Comments: Yellow crystals of jáchymovite.
Location: Jáchymov (St Joachimsthal), Krusné Hory (Erzgebirge), Západoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Jacobsite Image

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Jacobsite: (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4  
Barite: BaSO4

Comments: Sharp, octahedral crystals of Jacobsite on a bladed barite matrix.
Location: N' Chwaning II Mine, Kuruman, South Africa. Scale: 3x2.5x1.9 cm.
© Isaias Casanova / IC Minerals

Jacobsite Image

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Jacobsite: (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4  
Ganomalite: Pb9Ca5Mn++Si9O33

Comments: White crystalline ganomalite with dark granular jacobsite.
Location: Jacobsberg, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jadarite Image

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Jadarite: LiNaB3SiO7(OH)

Comments: Quarter section of drill core sample of white, massive jardarite.
Location: Jadar Basin, Serbia.. Scale: Sample Size 3 cm.
© Natrual History Museum

Jadeite Image

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Jadeite: Na(Al,Fe+++)Si2O6

Comments: Fibrous crystals of Jadeite.
Location: Russian River, near Cloverdale, Mendocino County, California, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Jadeite Image

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Jadeite: Na(Al,Fe+++)Si2O6  
Stronalsite: SrNa2Al4Si4O16

Comments: White stronalsite veinlets in massive pale green jadeite.
Location: Ohasa, Okayama, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jagoite Image

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Jagoite: (Pb,Na,Ca)3(Fe+++,Mg)Si3O10(Cl,OH)

Comments: Yellow crystalline fragment of jagoite in hausmannite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jagowerite Image

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Jagowerite: BaAl2(PO4)2(OH)2

Comments: Pale green to white massive jagowerite.
Location: Hess River, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jagowerite Image

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Jagowerite: BaAl2(PO4)2(OH)2  
Penikisite: BaMg2Al2(PO4)3(OH)3

Comments: Light green crystal of jagowerite intergrown with darker green penikisite in a tetrahedrite (black) and white quartz matrix.
Location: From quartz veins cutting clays 26 km N of Hess River, Yukon Territory, Canada. Scale: Sample size 2x1 cm.
© Dave Barthelmy

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