Mineral Specimen Images (G)

Ganophyllite: (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7·8-9(H2O)

Comments: SEM image of a ganophyllite crystal. (AmMin, 88:1325).
Location: Molinello Mine, Val Graveglia, Italy. Scale: Scale bar 100 µ-m.
© American Mineralogist

Ganophyllite: (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7·8-9(H2O)

Comments: SEM image of a ganophyllite crystal. (AmMin, 88:1325).
Location: Molinello Mine, Val Graveglia, Italy. Scale: Scale bar 100 µ-m.
© American Mineralogist

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

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

Ganterite: [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2

Comments: BSE image of thin-section showing ganterite (G) portion of a larger muscovite (M) grain. The lighter color corresponds to greater heavy element (Ba) contents. AmMin, v92, p703.
Location: Lincoln Hill dumortierite deposit in the Humboldt Range located near Oreana, Pershing County, Nevada. Scale: Picture size 300 µm.
© American Mineralogist

Ganterite: [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2

Comments: Black and white thin-section micrograph of ganterite in white mica schist (sample SS9787) (S.Gt: synkinematic ganterite; P.Gt: postkinematic ganterite. (CanMin 41:1284).
Location: Metamorphosed basement rocks from the Berisal Complex, Simplon Region, Switzerland. Scale: See Image.
© Canadian Mineralogist

Ganterite: [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2

Comments: BSE image of thin-section showing ganterite (G) portion of a larger muscovite (M) grain. The lighter color corresponds to greater heavy element (Ba) contents. AmMin, v92, p703.
Location: Lincoln Hill dumortierite deposit in the Humboldt Range located near Oreana, Pershing County, Nevada. Scale: Picture size 300 µm.
© American Mineralogist

Ganterite: [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2

Comments: Black and white thin-section micrograph of ganterite in white mica schist (sample SS9787) (S.Gt: synkinematic ganterite; P.Gt: postkinematic ganterite. (CanMin 41:1284).
Location: Metamorphosed basement rocks from the Berisal Complex, Simplon Region, Switzerland. Scale: See Image.
© Canadian Mineralogist

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

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

Gartrellite: Pb(Cu,Fe++)2(AsO4,SO4)2(CO3,H2O)0.7

Comments: Lime green gartrellite on matrix associated with mimetite. Former Martín Oliete Fontela collection.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: 6x4x3 cm.
© Fabre Minerals

Gartrellite: Pb(Cu,Fe++)2(AsO4,SO4)2(CO3,H2O)0.7

Comments: Lime green gartrellite on matrix associated with mimetite. Former Martín Oliete Fontela collection.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: 6x4x3 cm.
© Fabre Minerals

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

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

Gasparite-(Ce): CeAsO4

Comments: Crude gasparite-(Ce) crystal possibly pseudomorphous after synchysite.
Location: Mount Cervandone,Devero Valley, Baceno, Ossola Valley, Piedmont, Italy. Scale: Crystal Size 2 mm.
© Carlo Guidarin

Gasparite-(Ce): CeAsO4

Comments: Crude gasparite-(Ce) crystal possibly pseudomorphous after synchysite.
Location: Mount Cervandone,Devero Valley, Baceno, Ossola Valley, Piedmont, Italy. Scale: Crystal Size 2 mm.
© Carlo Guidarin

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

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

Gatelite-(Ce): (Ca,Ce,La,Nd)4(Al,Mg,Fe)4[Si2O7][SiO4]3(O,F,OH)3

Comments: B&W image of crystals of gatelite-(Ce). (AmMin, v88:223).
Location: Trimouns talc deposit, Luzenac, Ariege, French Pyrenees. Scale: Crystal Length 700 µm.
© R. Vernet / American Mineralogist

Gatelite-(Ce): (Ca,Ce,La,Nd)4(Al,Mg,Fe)4[Si2O7][SiO4]3(O,F,OH)3

Comments: B&W image of crystals of gatelite-(Ce). (AmMin, v88:223).
Location: Trimouns talc deposit, Luzenac, Ariege, French Pyrenees. Scale: Crystal Length 700 µm.
© R. Vernet / American Mineralogist