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Friedrichite: Pb5Cu5Bi7S18 Krupkaite: PbCuBi3S6 Benjaminite: (Ag,Cu)3(Bi,Pb)7S12
Comments: Crystals of a mixture of friedrichite, krupkaite, and benjaminite, with quartz crystals. Location: Estela Mine, Julcani District, Junin, Peru. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Frohbergite: FeTe2
Comments: Irregular black mssses of frohbergite in quartzite matrix. Location: San Simon Basin (San Simon River; Bowie Chabazite deposit), Bowie area, Cochise Co., Arizona, USA. Scale: Picture Size 2.5 mm. © Jeff Weissman / Photographic Guide to Mineral Species
Frolovite: CaB2(OH)8
Comments: Clear to white crystalline frolovite in rock. Location: Solongo, Republic of Buryatia, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Froodite: PdBi2
Comments: Froodite grain (see arrow) in mostly chalcopyrite matrix. Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Froodite: PdBi2 Maslovite: PtBiTe Altaite: PbTe
Comments: Reflected light photomicrograph of maslovite (M), froodite (F), and altaite (A), in chalcopyrite matrix. Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Fukuchilite: Cu3FeS8
Comments: Dark brown fine-grained fukuchilite in white gypsum. Location: Hanawa Mine, Kazuno City, Akita, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Furongite: Al2(UO2)(PO4)3(OH)2·8(H2O)
Comments: Pale yellow crystalline furongite. Location: Furong Lin, Ling Wu, Western Hunan Province, China. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gahnite: ZnAl2O4
Comments: Deep blue octahedral crystals of gahnite in quartz. Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gaidonnayite: Na2ZrSi3O9·2(H2O)
Comments: Translucent tan spherical gaidonnayite crystal aggregates. Location: Mont Saint Hilaire, Rouville County, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gainesite: Na2Zr2Be(PO4)4·1-2(H2O)
Comments: Fragment of intensely blue colored gainesite on paper. Location: Nevel Quarry (Twin Tunnels; United Feldspar Quarry), Newry, Oxford Co., Maine, USA. Scale: Fragment Size 0.2 mm. © Jeff Weissman / Photographic Guide to Mineral Species
Gaitite: Ca2Zn(AsO4)2·2(H2O)
Comments: Opaque white spherical gaitite with transparent crystalline calcite. Location: Twin Creeks Mine, Humboldt County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Galaxite: (Mn,Mg)(Al,Fe+++)2O4 Alleghanyite: Mn5(SiO4)2(OH)2
Comments: Black granular galaxite with reddish alleghanyite and white kutnohorite. Location: Bald Knob, Alleghany County, North Carolina, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Galeite: Na15(SO4)5F4Cl
Comments: White translucent spherical crystalline aggregates of galeite in clay. Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Galenobismutite: PbBi2S4
Comments: Black metallic massive galenobismutite in translucent quartz. Location: Vastervik, Smaland, Kalmar, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gamagarite: Ba2(Fe+++,Mn+++)(VO4)2(OH)
Comments: Dark red-brown crystalline gamagarite in white calcite. Location: Molinello Mine, Val Graveglia, Genova, Liguria, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Ganomalite: Pb9Ca5Mn++Si9O33 Jacobsite: (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4
Comments: White crystalline ganomalite with dark granular jacobsite. Location: Jacobsberg, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Ganophyllite: (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7·8-9(H2O)
Comments: Light brown micaceous ganophyllite with milky quartz. Location: Gambatesa Mine, Genova, Liguria, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Garronite: Na2Ca5Al12Si20O64·27(H2O) Siderite: Fe++CO3
Comments: Translucent white micro crystals of garronite on brown siderite crystals. Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Garyansellite: (Mg,Fe+++)3(PO4)2(OH,O)·1,5(H2O)
Comments: Brown crystalline garyansellite with quartz. Location: Rapid Creek, Yukon Territory, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gaspeite: (Ni,Mg,Fe++)CO3
Comments: Green, crystalline massive gaspeite in matrix. Location: Lemieux Township, Gaspe Peninsula, Gaspe Nord County, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species