's Image Gallery

Gjerdingenite-Na: (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4·5H2O

Comments: Pseudomorphs of gjerdingenite-Na (Gje) after vuonnemite with eudialyte and two generations of aegirine (right part of the specimen). (CanMin, v45:529).
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Specimen Size 8 cm.
© P. Tarassoff / Canadian Mineralogist

Gjerdingenite-Na: (K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4·5H2O

Comments: SEM photomicrographs of gjerdingenite-Na showing a cluster of pseudo hexagonal prismatic crystals on microcline.
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: See Image.
© Canadian Mineralogist

Gladite: PbCuBi5S9

Comments: Bluish-gray prismatic crystal of gladite on calcite.
Location: Holzmühlental quarry, Flechtingen, Saxony-Anhalt, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Gladiusite: Fe++2(Fe+++,Mg)4(PO4)(OH)13·H2O

Comments: Radiating group of dark olive-greenish acicular crystals of gladiusite on matrix.
Location: Kovdor Mine, Kovdor massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Gladiusite: Fe++2(Fe+++,Mg)4(PO4)(OH)13·H2O

Comments: SEM photomicrograph showing the morphology of the free-standing crystals of gladiusite. (CanMin v. 38, p 1480).
Location: Kovdor alkaline-ultramafic complex, Kola Peninsula, Russia. Scale: See Image.
© Canadian Mineralogist

Glagolevite: NaMg6[Si3AlO10](OH,O)8·H2O  
Andradite: Ca3Fe+++2(SiO4)3

Comments: Pearly white plates of glagolevite with olive-colored andradite dodecohedrons.
Location: Zheleznyi Mine (Iron Mine), Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 12x10 mm.
© Pavel M. Kartashov

Glauberite: Na2Ca(SO4)2

Comments: Translucent crystals of glauberite.
Location: Superior, Pinal County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glauberite: Na2Ca(SO4)2  
Hydroglauberite: Na4Ca(SO4)3·2(H2O)

Comments: Putty-colored chalky hydroglauberite on glauberite crystals.
Location: Camp Verde, Yavapai County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glaucocerinite: (Zn,Cu)5Al3(SO4)1.5(OH)16·9(H2O)

Comments: Botryoidal crust of blue glaucocerinite.
Location: Mina Serpieri, Laurium, Attiki, Greece. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glaucochroite: CaMnSiO4  
Zincite: (Zn,Mn)O  
Willemite: Zn2SiO4

Comments: Pinkish gray crystalline glaucochroite intermixed with pale green willemite, with dark red zincite and white calcite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glaucodot: (Co,Fe)AsS

Comments: Metallic lustered crystal of glaucodot on matrix.
Location: Hakansboda, Vastmanland, Sweden. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Glauconite: (K,Na)(Fe+++,Al,Mg)2(Si,Al)4O10(OH)2

Comments: Green glauconite intermixed with quartz.
Location: Ightham, Kent, England. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glaucophane: [ ]Na2(Mg3Al2)Si8O22(OH)2

Comments: Pale violet to gray fibrous massive glaucophane.
Location: Lac Malartic, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glaukosphaerite: (Cu,Ni)2(CO3)(OH)2

Comments: Green botryoidal crust of glaukosphaerite.
Location: Carr-Boyd Nickel Mine, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glucine: CaBe4(PO4)2(OH)4·0.5(H2O)  
Moraesite: Be2(PO4)(OH)·4(H2O)

Comments: Light brown glucine with white moraesite.
Location: Boevskoye Mine, Sverdlovsk District, Middle Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glushinskite: Mg(C2O4)·2(H2O)

Comments: White coatings of glushinskite on dirty, tan gypsum.
Location: San Simon, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glushinskite: Mg(C2O4)·2(H2O)

Comments: SEM photo of two large euhedral glushinskite crystals partially embedded in the dried, rotten saguaro matrix. (AmMin, 88:1883).
Location: Crystals associated with the remains of a saguaro, Carnegiea gigantea from south and west central Arizona. Scale: Scale bar 150 µ-m.
© American Mineralogist

Gmelinite-Ca: (Ca,Na2)Al2Si4O12·6(H2O)

Comments: Tanslucent, salmon-colored gmelinite-Ca crystals.
Location: Sarbaiskoe deposit (Sarbai; Sarbay Mine), Qostaney Oblysy (Kostanai [Kustany] Oblast'), Kazakhstan. Scale: Specimen Size 7.9 x 5.9 x 5.1 cm.
© Rob Lavinsky

Gmelinite-K: (K,Na,Ca)6(Al7Si17O48)·22(H2O)

Comments: Pink to reddish brown gmelinite-K crystals in a cavity in matrix.
Location: Fara Vicentino, Vicenza, Veneto, Italy. Scale: Not Given.
© Diederik Visser

Gmelinite-Na: (Na2,Ca)Al2Si4O12·6(H2O)

Comments: White crystalline aggregate of gmelinite.
Location: Antrim, Northern Ireland. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals