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Yarrowite: Cu9S8 Spionkopite: Cu1.4S
Comments: Blue-gray metallic yarrowite grains in granular quartz rock with spionkopite. Location: Yarrow Creek, Alberta, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Yavapaiite: KFe+++(SO4)2
Comments: Translucent pale pinkish-tan colored crystal fragments. Location: United Verde Mine, Jerome, Verde District, Black Hills (Black Hill Range), Yavapai Co., Arizona, USA. Scale: Fragment Size 1 mm. © Jeff Weissman / Photographic Guide to Mineral Species
Yecoraite: Bi5Fe+++3(Te++++O3)(Te++++++O4)2O9·9(H2O)
Comments: Tan to reddish brown resinous yecoraite coatings on quartz. Location: Marie Elena Mine, Yecora, Sonora, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Yedlinite: Pb6CrCl6(O,OH)8 Diaboleite: Pb2CuCl2(OH)4
Comments: Minute cranberry-colored rounded yedlinite crystal with blue diaboleite on yellow-brown wulfenite. Location: Mammoth Mine, Tiger, Pinal County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Yoderite: Mg2(Al,Fe+++)6Si4O18(OH)2
Comments: Dark bluish-black prismatic yoderite in quartz. Location: Mautia Hill, Dodoma, Tanzania. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Yoshimuraite: (Ba,Sr)2(Mn,Fe)2(Ti,Fe)(Si2O7)2(PO4,SO4)(OH)
Comments: Translucent, brown yoshimuraite microcrystal. Location: Toguchi Mine, Shidara, Kitashidara-Gun, Aichi, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Yugawaralite: CaAl2Si6O16·4(H2O)
Comments: Pearly translucent colorless yugawaralite microcrystals. Location: Klif Hvalfjordur, Iceland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Yukonite: Ca7Fe+++11(AsO4)9O10·24.3(H2O)
Comments: dark red brown resinous yukonite on limonite. Location: Venus Gold-Silver mine, Yukon Territory, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Yuksporite: (Sr,Ba)2K4(Ca,Na)14([ ],Mn,Fe){(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n, n~3
Comments: Opaque fibrous yuksporite aggregate. Location: Mount Yukspor, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Yushkinite: V1-xS·n(Mg,Al)(OH)2
Comments: Veinlet of purple metallic yushkinite in white calcite. Location: Yushkinite gorge, Yugorskii Peninsula, Polar Urals, Russia. Scale: Picture Size 3 mm. © Jeff Weissman / Photographic Guide to Mineral Species