Canadian Mineralogist's Image Gallery

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

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.
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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

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.
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Hakite: (Cu,Hg)3(Sb,As)(Se,S)3  
Chrisstanleyite: Ag2Pd3Se4

Comments: Polished section showing chrisstanleyite (chr) is present as a single grain intergrown with clausthalite (cl) and eucairite (eu). cp (chalcopyrite), ha (hakite), di (selenian digenite), bo (bornite). (CanMin, v43:689).
Location: Low-temperature selenium-rich assemblage at Predborice, Czech Republic. Scale: See Image.
© Canadian Mineralogist

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

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

Haleniusite-(La): (La,Ce)OF

Comments: Secondary electron microscope (SEM) image showing tabular brochantite crystals growing on a featureless håleniusite-(La) substrate. (CanMin 42:1099).
Location: Mine dumps of Bastnäs deposit, Skinnskatteberg District, Västmanland County, Sweden. Scale: Scale Bar 100 µ-m.
© Canadian Mineralogist

Haleniusite-(La): (La,Ce)OF

Comments: Back-scattered electron (BSE) micrograph of a section of bastnäsite-(La) showing partial alteration to håleniusite-(La), which is white on the image. Black areas are voids. (CanMin 42:1099).
Location: Mine dumps of Bastnäs deposit, Skinnskatteberg District, Västmanland County, Sweden. Scale: Scale Bar 100 µ-m.
© Canadian Mineralogist

Harkerite: Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10·2(H2O)

Comments: B&W PPL image of harkerite (Hrk) and clintonite (Cln) aggregate with inclusions of spinel (Spl) in Crestmore marble #2A Mgt: magnetite, Anh: anhydrite, Cal: calcite.
Location: Low-pressure contact aureole in the Crestmore quarry, Riverside County, California, USA. (CanMin, v37:277). Scale: See Image.
© Canadian Mineralogist

Hemloite: (As,Sb)2(Ti,V,Fe,Al)12O23OH

Comments: Coarse composite grain of hemloite surrounding rutile, with some alteration to titanite. The white grains are pyrite. (CanMin, v27:427).
Location: Drill core samples from the Hemlo gold deposit, Hemlo, Ontario, Canada. Scale: See Image.
© Canadian Mineralogist

Henrymeyerite: BaFe++Ti7O16

Comments: Slender prismatic crystals of henrymeyerite intergrown with stubby hexagonal prisms of fluorapatite and dolomite rhombohedra. (CanMin v 38. p 620).
Location: Kovdor alkaline ultramafic complex, Kola Peninsula, Russia. Scale: Image size 0.2 mm.
© Canadian Mineralogist

Hephaistosite: TlPb2Cl5

Comments: BSE image of hephaistosite crystals (CanMin, v43:701).
Location: Rim of La Fossa crater, Vulcano Island, Aeolian archipelago, Sicily, Italy. Scale: Crystal length 0.5 mm.
© Canadian Mineralogist

Hillite: Ca2(Zn, Mg)[PO4]2·2(H2O)  
Scholzite: CaZn2(PO4)2·2(H2O)

Comments: Morphology of a homogeneous larger cluster of hillite growing on an acicular crystal of scholzite. SEM back-scattered electron image.
Location: Lower Cambrian Parachilna Formation, Reaphook Hill, South Australia, Australia. Scale: See Image.
© Canadian Mineralogist

Hodrushite: Cu8Bi12S22  
Cupromakovickyite: Cu4AgPb2Bi9S18

Comments: Kup?cíkite (ku) and hodrushite (ho) partly replaced by bismuthinite derivative (bd56) with relict lamellae of low-Cu (4P) and cupromakovickyite [4P(Cu,Pb)]. (CanMin, 41:1165).
Location: Scheelite deposit of Felbertal, Austria. Scale: Scale Bar 100 µm.
© Canadian Mineralogist

Insizwaite: Pt(Bi,Sb)2  
Moncheite: (Pt,Pd)(Te,Bi)2

Comments: Back-scattered electron image showing b) intergrowth of taimyrite-tatyanaite with moncheitei-insizwaite (CanMin, v 42, p 611).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia. Scale: See Image.
© Canadian Mineralogist

Irarsite: (Ir,Ru,Rh,Pt)AsS  
Ruthenarsenite: (Ru,Ni)As

Comments: Photomicrograph of the largest inclusion of ruthenarsenite (Ru) associated with irarsite inclusions (Ir) in a rutheniridosmine matrix. (CanMin, v12:280).
Location: Papua New Guinea. Scale: See Image.
© Canadian Mineralogist

Jagueite: Cu2Pd3Se4

Comments: Polished section (oil-immersion, plain polarized on left, cross-polarized on right) showing lobate grains of chrisstanleyite (Chr), replaced by jaguéite (Jag), with tiemannite (Tie). The jaguéite twinning is evident by banding in both images.
Location: El Chire prospect, Los Llantenes District of La Rioja Province, Argentina.. Scale: Picture size 150 µm.
© Canadian Mineralogist

Jolliffeite: (Ni,Co)AsSe  
Eskebornite: CuFeSe2

Comments: Back-scattered electron image of jolliffeite in sulfurian eskebornite. Note the cracked appearance and the different brightness of eskebornite, which is a reflection of variable ratio of selenium to sulfur. (CanMin v 42, p 844).
Location: Niederschlema-Alberoda uranium deposit, in the Erzgebirge region of Germany. Scale: See Image.
© Canadian Mineralogist