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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