Canadian Mineralogist's Image Gallery

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: 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

Gehlenite: Ca2Al(AlSi)O7

Comments: Contact area between vesuvianite (right) and gehlenite (left). Note the lamellae of clintonite included mainly in the gehlenite crystals (CanMin v. 41. p 1259).
Location: Skarns along the contact of a diorite intrusion at Oravit¸a, Banat, in Romania. Scale: Image size 2.7 mm.
© Canadian Mineralogist

Gehlenite: Ca2Al(AlSi)O7

Comments: Contact area between vesuvianite (right) and gehlenite (left). Note the lamellae of clintonite included mainly in the gehlenite crystals (CanMin v. 41. p 1259).
Location: Skarns along the contact of a diorite intrusion at Oravit¸a, Banat, in Romania. Scale: Image size 2.7 mm.
© Canadian Mineralogist

Genkinite: (Pt,Pd)4Sb3

Comments: Genkinite (3), with a typical rim of an undetermined oxidation product (darker grey), closely associated with platarsite (2) and Pt-Fe alloy (1). Chromite crystals (4).
Location: In the Onverwacht and Driekop mines, Transvaal, South Africa. (CanMin, v15:389). Scale: See Image.
© Canadian Mineralogist

Genkinite: (Pt,Pd)4Sb3

Comments: Genkinite (3), with a typical rim of an undetermined oxidation product (darker grey), closely associated with platarsite (2) and Pt-Fe alloy (1). Chromite crystals (4).
Location: In the Onverwacht and Driekop mines, Transvaal, South Africa. (CanMin, v15:389). Scale: See Image.
© Canadian Mineralogist

Gerenite-(Y): (Ca,Na)2(Y,REE)3Si6O18·2(H2O)

Comments: BSE image of eutectoid intergrowth of quartz (black) and gerenite-(Y) (white). (CanMin, v36:793).
Location: Strange Lake peralkaline complex, Quebec-Labrador boundary, Canada. Scale: Scale Bar 100 µm.
© Canadian Mineralogist

Gerenite-(Y): (Ca,Na)2(Y,REE)3Si6O18·2(H2O)

Comments: BSE image of eutectoid intergrowth of quartz (black) and gerenite-(Y) (white). (CanMin, v36:793).
Location: Strange Lake peralkaline complex, Quebec-Labrador boundary, Canada. Scale: Scale Bar 100 µm.
© Canadian Mineralogist

Geversite: Pt(Sb,Bi)2

Comments: Several PGM (mertieite, geversite: white) in a silicate matrix (black) of ferrian chromite (FeCr). (CanMin v40:277).
Location: Gabbro-hosted Precambrian Baula Complex, in Orissa, India. Scale: See Image.
© Canadian Mineralogist

Geversite: Pt(Sb,Bi)2

Comments: Several PGM (mertieite, geversite: white) in a silicate matrix (black) of ferrian chromite (FeCr). (CanMin v40:277).
Location: Gabbro-hosted Precambrian Baula Complex, in Orissa, India. Scale: See Image.
© Canadian Mineralogist

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

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

Gjerdingenite-Fe: K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O)  
Ralstonite: NaxMgxAl2-x(F,OH)6·(H2O)

Comments: SEM photomicrograph of gjerdingenite-Fe. The mineral is dusted with tiny crystals of two phases. At high magnification, one of them is seen to form cubes and is probably ralstonite.
Location: Gjerdingselva, Lunner, Oppland, Oslo Region, Norway. Scale: Crystal length 0.5 mm.
© Canadian Mineralogist

Gjerdingenite-Fe: K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O)  
Ralstonite: NaxMgxAl2-x(F,OH)6·(H2O)

Comments: SEM photomicrograph of gjerdingenite-Fe. The mineral is dusted with tiny crystals of two phases. At high magnification, one of them is seen to form cubes and is probably ralstonite.
Location: Gjerdingselva, Lunner, Oppland, Oslo Region, Norway. Scale: Crystal length 0.5 mm.
© 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

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

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

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

Graeserite: (Fe+++,Ti)4Ti3AsO13(OH)

Comments: SEM photomicrograph of an aggregate of hair-like graeserite crystals. CanMin v36:1083.
Location: Monte Leone Nappe, Binntal region, Western Alps, Switzerland. Scale: Scale Bar 1 mm.
© Canadian Mineralogist

Graeserite: (Fe+++,Ti)4Ti3AsO13(OH)

Comments: SEM photomicrograph of an aggregate of hair-like graeserite crystals. CanMin v36:1083.
Location: Monte Leone Nappe, Binntal region, Western Alps, Switzerland. Scale: Scale Bar 1 mm.
© Canadian Mineralogist