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Goosecreekite: CaAl2Si6O16·5(H2O)
Comments: Large cluster of many rosettes of white goosecreekite. Location: Jalgaon, Maharashtra, India. Scale: 15x14x7 cm. © John Betts - Fine Minerals
Gorceixite: BaAl3(PO4)(PO3OH)(OH)6
Comments: Translucent platy crystals of gorceixite on tan siderite with white aragonite coatings. Location: Rapid Creek, Yukon, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Translucent, pseudohexagonal crystal of groceixite in matrix. Location: Rapid Creek, Yukon, Canada. Scale: Crystal Size 3 mm. © Tom Loomis / Dakota Matrix
Gordaite: NaZn(SO4)(OH)6Cl·6(H2O)
Comments: Colorless to white tabular crystals of gordaite on matrix. Location: Mansfeld Basin, Saxony-Anhalt, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Gordonite: MgAl2(PO4)2(OH)2·8(H2O) Wardite: NaAl3(PO4)2(OH)4·2(H2O)
Comments: Prismatic gordonite crystals on massive wardite. Location: Clay Canyon, Fairfield, Utah County, Utah, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Gorgeyite: K2Ca5(SO4)6·(H2O)
Comments: görgeyite crystal prism. Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gormanite: Fe++3Al4(PO4)4(OH)6·2(H2O)
Comments: Elongated, dark bluish green, fibrous crystals of gormanite and quartz on a matrix of quartz and water clear apatite crystals. Location: Big Fish River, Yukon Territory, Canada. Scale: 4.8 x 3.8 cm. © John Veevaert
Comments: Dark green, velvety mass of gormanite crystals on matrix. Location: Rapid Creek, Yukon Territory, Canada. Scale: 3 x 4.5 cm. © Dave Barthelmy
Goslarite: ZnSO4·7(H2O)
Comments: Pale yellow to egg-shell white fibrous goslarite with radiating structure. Location: Rammelsberg, near Goslar, Harz Mountains, Niedersachsen, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gottlobite: CaMg(VO4,AsO4)(OH)
Comments: Orange-brownish tabular crystals of gottlobite with black hausmannite and colorless barite. Location: Glücksstern Mine, Gottlob Hill, Friedrichroda, Thuringian Forest, Thuringia, Germany. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag
Gotzenite: (Ca,Na)3(Ti,Al)Si2O7(F,OH)2
Comments: Yellow-brown, thin crystals of götzenite in white feldspar matrix. Location: Barkevik, Langesundsfjorden, Vestfold, Norway. Scale: 3.5x3x3 cm. © John Betts - Fine Minerals
Goudeyite: (Al,Y)Cu6(AsO4)3(OH)6·3(H2O)
Comments: Green crusts and micro crystals of goudeyite on matrix. Location: Majuba Hill, Pershing County, Nevada, USA. Scale: Specimen size 1x3 cm. © John Veevaert
Gowerite: CaB6O10·5(H2O)
Comments: Coatings of acicular radiating crystal clusters of gowerite. Location: Furnace Creek, Death Valley, Inyo County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Goyazite: SrAl3(PO4)2(OH)5·(H2O)
Comments: Flat, tabular crystals of goyazite on dolomite. Location: Langenbach quarry, Binntal, Valais, Switzerland. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Graemite: CuTeO3·(H2O)
Comments: Blue, massive graemite on quartz. Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5.5 mm. © Thomas Witzke / Abraxas-Verlag
Graeserite: (Fe+++,Ti)4Ti3AsO13(OH)
Comments: SEM photomicrograph of an aggregate of hair-like graeserite crystals. CanMin v36:1083. Location: Monte Leone Nappe, Binntal region, Western Alps, Switzerland. Scale: Scale Bar 1 mm. © Canadian Mineralogist
Graftonite: (Fe++,Mn,Ca)3(PO4)2 Heterosite: Fe+++PO4
Comments: Whitish graftonite intergrown with dark purple to brown heterosite. Location: Grafton, Grafton County, New Hampshire, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gramaccioliite-(Y): (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38
Comments: Black, metallic rystals of gramaccioliite-(Y) in matrix. Location: Sambuco, Pianche di Vinazio, Piemont, Italy. Scale: Picture size 1.3 mm.. © Thomas Witzke
Grandidierite: (Mg,Fe++)Al3(BO4)(SiO4)O
Comments: Translucent blue-green crystalline grandidierite in pegmatite. Location: Vohibola, Madagascar. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Grandidierite: (Mg,Fe++)Al3(BO4)(SiO4)O Boralsilite: Al16B6Si2O27
Comments: B&W PPL image of aggregates of boralsilite in quartz near grandidierite. Pyrite is partially replaced by oxide. Abbrev: A+B = Secondary andalusite, B = boralsilite, G = grandidierite, P = pyrite, Q = quartz. (AmMin v93:294). Location: Pegmatites from the Larsemann Hills, East Antarctica. Scale: See Image. © American Mineralogist