Mineral Specimen Images (G)

Gianellaite: Hg4(SO4)N2

Comments: Yellow crystalline coatings of gianellaite on calcite.
Location: Mariposa Mine, Terlingua, Brewster County, Texas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gianellaite: Hg4(SO4)N2

Comments: Yellow crystalline coatings of gianellaite on calcite.
Location: Mariposa Mine, Terlingua, Brewster County, Texas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gibbsite: Al(OH)3  
Doyleite: Al(OH)3

Comments: Botryoidal spheres of doyleite growing along with its dimorph gibbsite. Analysis shows that doyleite dominates the mix. There are also minor canary yellow phlogopite crystals.
Location: Baoshan, Yunnan, China. Scale: 8 x 6.5 x 1.9 cm.
© Fabre Minerals

Gibbsite: Al(OH)3

Comments: Transparent to white, tabular-prismatic gibbsite crystals.
Location: Saga Quarry, Langesundfjord, Oslo Region, Norway. Scale: Crystal size 1 mm.
© John Veevaert

Gibbsite: Al(OH)3

Comments: Transparent to white, tabular-prismatic gibbsite crystals.
Location: Saga Quarry, Langesundfjord, Oslo Region, Norway. Scale: Crystal size 1 mm.
© John Veevaert

Gibbsite: Al(OH)3  
Doyleite: Al(OH)3

Comments: Botryoidal spheres of doyleite growing along with its dimorph gibbsite. Analysis shows that doyleite dominates the mix. There are also minor canary yellow phlogopite crystals.
Location: Baoshan, Yunnan, China. Scale: 8 x 6.5 x 1.9 cm.
© Fabre Minerals

Giessenite: Pb13(Cu,Ag)(Bi,Sb)9S28 (?)

Comments: Small clumps of acicular crystal mats of giessenite with rounded cosalite grains (as photographed on pure white fibrous backing material).
Location: Otome Mine, near Kofu, Yamanashi, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Giessenite: Pb13(Cu,Ag)(Bi,Sb)9S28 (?)

Comments: Small clumps of acicular crystal mats of giessenite with rounded cosalite grains (as photographed on pure white fibrous backing material).
Location: Otome Mine, near Kofu, Yamanashi, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gilalite: Cu5Si6O17·7(H2O)

Comments: Striated, prismatic pale greenish yellow crystal of gilalite.
Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gilalite: Cu5Si6O17·7(H2O)

Comments: Striated, prismatic pale greenish yellow crystal of gilalite.
Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gilalite: Cu5Si6O17·7(H2O)

Comments: Green spherical crystals of gilalite to 0.3mm in grape-like bunches.
Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Gilalite: Cu5Si6O17·7(H2O)

Comments: Green spherical crystals of gilalite to 0.3mm in grape-like bunches.
Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Gillardite: Cu3NiCl2(OH)6

Comments: Dark green druze of gillardite and lighter green gasphite in a complex gossenous matrix.
Location: 132 North Mine, Widgiemooltha, Western Australia, Australia. Scale: Specimen Size 3.6 x 1.7 x 2.6 cm.
© Minservice

Gillardite: Cu3NiCl2(OH)6

Comments: Dark green druze of gillardite and lighter green gasphite in a complex gossenous matrix.
Location: 132 North Mine, Widgiemooltha, Western Australia, Australia. Scale: Specimen Size 3.6 x 1.7 x 2.6 cm.
© Minservice

Gillespite: BaFe++Si4O10  
Pellyite: Ba2Ca(Fe++,Mg)2Si6O17

Comments: Red crystalline gillespite with yellow pellyite rock matrix.
Location: GUN claims, Itsi Mountains, MacMillan Pass Area, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gillespite: BaFe++Si4O10  
Anandite: (Ba,K)(Fe++,Mg)3(Si,Al,Fe)4O10(S,OH)2

Comments: Black micaceous anandite with dark red gillespite.
Location: Esquire No. 7 Claim, Big Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gillespite: BaFe++Si4O10  
Bigcreekite: BaSi2O5·4(H2O)  
Sanbornite: BaSi2O5

Comments: Tiny white, spherical patterns, halo-like crystals of bigcreekite to about 0.5mm and reddish gillespite in a matrix of pale yellowish sanbornite.
Location: Trumbull Peak, Mariposa Co., California, United States. Scale: 2.5 x 2 x 2cm.
© Tom Loomis / Dakota Matrix

Gillespite: BaFe++Si4O10  
Anandite: (Ba,K)(Fe++,Mg)3(Si,Al,Fe)4O10(S,OH)2

Comments: Black micaceous anandite with dark red gillespite.
Location: Esquire No. 7 Claim, Big Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gillespite: BaFe++Si4O10  
Pellyite: Ba2Ca(Fe++,Mg)2Si6O17

Comments: Red crystalline gillespite with yellow pellyite rock matrix.
Location: GUN claims, Itsi Mountains, MacMillan Pass Area, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gillespite: BaFe++Si4O10  
Bigcreekite: BaSi2O5·4(H2O)  
Sanbornite: BaSi2O5

Comments: Tiny white, spherical patterns, halo-like crystals of bigcreekite to about 0.5mm and reddish gillespite in a matrix of pale yellowish sanbornite.
Location: Trumbull Peak, Mariposa Co., California, United States. Scale: 2.5 x 2 x 2cm.
© Tom Loomis / Dakota Matrix