's Image Gallery

Gageite: (Mn,Mg,Zn)42Si16O54(OH)40

Comments: Preserved sprays of inesite completely replaced by tan-colored gageite crystals.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 5 x 4.6 cm.
© John Veevaert

Gahnite: ZnAl2O4

Comments: Deep blue octahedral crystals of gahnite in quartz.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gahnite: ZnAl2O4

Comments: Optical micrograph of gahnite (blue) + Na-Ca-Li mica pseudomorph after staurolite in calcite matrix pigmented with brownish Fe-(hydr)oxide. (AmMin, 88:794).
Location: Diaspore-bearing metabauxite from East Samos (Greece). Scale: See Image.
© American Mineralogist

Gaidonnayite: Na2ZrSi3O9·2(H2O)

Comments: Translucent tan spherical gaidonnayite crystal aggregates.
Location: Mont Saint Hilaire, Rouville County, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gainesite: Na2Zr2Be(PO4)4·1-2(H2O)

Comments: Fragment of intensely blue colored gainesite on paper.
Location: Nevel Quarry (Twin Tunnels; United Feldspar Quarry), Newry, Oxford Co., Maine, USA. Scale: Fragment Size 0.2 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Gaitite: Ca2Zn(AsO4)2·2(H2O)

Comments: Opaque white spherical gaitite with transparent crystalline calcite.
Location: Twin Creeks Mine, Humboldt County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Galaxite: (Mn,Mg)(Al,Fe+++)2O4  
Alleghanyite: Mn5(SiO4)2(OH)2

Comments: Black granular galaxite with reddish alleghanyite and white kutnohorite.
Location: Bald Knob, Alleghany County, North Carolina, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Galeite: Na15(SO4)5F4Cl

Comments: White translucent spherical crystalline aggregates of galeite in clay.
Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Galena: PbS

Comments: Galena on pyrrhotite. The crystals of galena reach to 1.5 cm across. All are cubic with octahedral modifications.
Location: Dal'Negorsk, Russia. Scale: 8x10 cm.
© John Veevaert

Galena: PbS  
Plumbojarosite: PbFe+++6(SO4)4(OH)12

Comments: Yellow, earthy plumbojarosite on massive, gray galena.
Location: Quarry No 3, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Galenobismutite: PbBi2S4

Comments: Black metallic massive galenobismutite in translucent quartz.
Location: Vastervik, Smaland, Kalmar, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Galkhaite: (Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12

Comments: Cherry red crystals of galkhaite on matrix.
Location: Getchell mine, Humboldt County, Nevada, USA. Scale: Crystal size 1 mm.
© John Veevaert

Gallite: CuGaS2

Comments: A mixture of massive high grade ore with grains of gallite (gray) occuring with germanite and renierite. Most of what can be seen is the renierite, which has reddish and purple iridescence.
Location: Tsumeb, Namibia. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Gamagarite: Ba2(Fe+++,Mn+++)(VO4)2(OH)

Comments: Dark red-brown crystalline gamagarite in white calcite.
Location: Molinello Mine, Val Graveglia, Genova, Liguria, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ganomalite: Pb9Ca5Mn++Si9O33  
Jacobsite: (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4

Comments: White crystalline ganomalite with dark granular jacobsite.
Location: Jacobsberg, Varmland, Sweden. 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

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

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

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