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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
Gatumbaite: CaAl2(PO4)2(OH)2·(H2O) Apatite-(CaF): Ca5(PO4)3F
Comments: White crystalline gatumbaite with yellow brazilianite in massive blue fluorapatite. Location: Buranga Pegmatite, near Gatumba, Gisenyi, Rwanda. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gaylussite: Na2Ca(CO3)2·5(H2O)
Comments: Clear, nearly colorless crystals of gaylussite. Location: Trona, Searles Lake, San Bernardino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gearksutite: CaAl(OH,F)5·(H2O)
Comments: White gearksutite crust on quartz. Location: Saint Peter's Dome, El Paso County, Colorado, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gedrite: [ ]Mg5Al2Si6Al2O22(OH)2
Comments: Back prismatic crystalline gedrite in rock. Location: Schissgruvan, near Ludvika, Dalarna, Kopparberg, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gehlenite: Ca2Al(AlSi)O7
Comments: Crystalline massive gehlenite. Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Georgbarsanovite: Na12(Mn,Sr,REE)3Ca6Fe++3Zr3NbSi25O76Cl2·H2O
Comments: A small translucent crystalline fragment of georgbarsanovite, from the type locality. Location: Nepheline pegmatite outcrop, Petrelius River, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Fragment Size 0.05 cm,. © Jeff Weissman / Photographic Guide to Mineral Species
Georgeite: Cu++5(CO3)3(OH)4·6(H2O)
Comments: Pale blue crusts of georgeite with dark green atacamite. Location: Carr-Boyd Nickel Mine, Western Australia, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gerasimovskite: (Mn,Ca)(Nb,Ti)5O12·9(H2O) (?) Ussingite: Na2AlSi3O8(OH)
Comments: Pale tan gerasimovskite pseudomorphous after epistolite crystal, in purple ussingite. Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species