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

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

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

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  
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

Gillulyite: Tl2(As,Sb)8S13

Comments: Dark red crystalline gillulyite in white calcite.
Location: South Mercur Pit, Barrick Gold Mine, Mercur, Tooele County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gilmarite: Cu3(AsO4)(OH)3

Comments: Scanning electron image of prismatic gilmarite crystals (Eur. J. Mineral, 11:549).
Location: Roua deposit, Guillaumes municipality, about 50 km from Nice, France. Scale: Picture size 80 µm.
© Eur. J. Mineral

Giniite: Fe++Fe+++4(PO4)4(OH)2·2(H2O)

Comments: Dark greenish black crystals of giniite on matrix.
Location: Sandamab, Usakos, Namibia. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Ginorite: Ca2B14O23·8(H2O)  
Priceite: Ca2B5O7(OH)5·H2O

Comments: Clear platy crystalline coatings of ginorite on rock with white priceite.
Location: Corkscrew Canyon, Death Valley, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Giorgiosite: Mg5(CO3)4(OH)2·5(H2O)

Comments: Opaque white nodular giorgiosite.
Location: Alphroessa, Santorini (Thira) Island, Notion Aiyalon, Greece. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Giraudite: (Cu,Zn,Ag)12(As,Sb)4(Se,S)13  
Hakite: (Cu,Hg)3(Sb,As)(Se,S)3

Comments: Polished Section image of giraudite-hakite (gir-hak) with berzelianite (bzl ) and galena (gln). (CanMin, v40:1161).
Location: Niederschlema-Alberoda uranium deposit, Erzgebirge, Germany. Scale: See Image.
© Canadian Mineralogist

Girdite: Pb3H2(Te++++O3)(Te++++++O6)

Comments: White chalky crystalline spherical massive girdite in rock.
Location: Grand Central Mine, Tombstone, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Girvasite: NaCa2Mg3(PO4)2[PO2(OH)2](CO3)(OH)2·4(H2O)

Comments: Translucent aggregate of girvasite.
Location: Kovdor Mine, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gismondine: Ca2Al4Si4O16·9(H2O)

Comments: Clear crystal of gismondine on matrix.
Location: Alban Hills, near Rome, Latium, Italy. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gittinsite: CaZrSi2O7  
Eudialyte: Na4(Ca,Ce)2(Fe++,Mn,Y)ZrSi8O22(OH,Cl)2 (?)

Comments: White crystalline gittinsite with red eudialyte.
Location: Kipiwa Complex, Villedieu Township, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species