Mineral Specimen Images (G)

Mineral Specimen Images (G)
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Mineral Specimen Images (G) With 378 Images

Grattarolaite Image

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Grattarolaite: Fe+++3O3(PO4)  
Rodolicoite: Fe+++PO4

Comments: Brown grattarolaite, intimately intergrown with brown rodolicoite.
Location: Castelnuovo Mine, Santa Barbara lignite district, San Giovanni Valdarno, Valdarno (Val d'Arno), Arezzo Province, Tuscany, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Grattarolaite Image

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Grattarolaite: Fe+++3O3(PO4)  
Rodolicoite: Fe+++PO4

Comments: Brown grattarolaite, intimately intergrown with brown rodolicoite.
Location: Castelnuovo Mine, Santa Barbara lignite district, San Giovanni Valdarno, Valdarno (Val d'Arno), Arezzo Province, Tuscany, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Graulichite-(Ce) Image

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Graulichite-(Ce): CeFe+++3(AsO4)2(OH)6

Comments: Scanning electron microscope image of rhombohedral graulichite-(Ce) crystals on goethite.
Location: Hourt quarry, Stavelot Massif, Belgian Ardennes. Scale: See Image.
© University de Liege

Graulichite-(Ce) Image

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Graulichite-(Ce): CeFe+++3(AsO4)2(OH)6

Comments: Scanning electron microscope image of rhombohedral graulichite-(Ce) crystals on goethite.
Location: Hourt quarry, Stavelot Massif, Belgian Ardennes. Scale: See Image.
© University de Liege

Gravegliaite Image

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Gravegliaite: Mn++(SO3)·3(H2O)

Comments: Pale brownish prismatic crystals of gravegliaite on matrix.
Location: Gambatesa Mine, Val Graveglia, Genova, Liguria, Italy. Scale: Picture Size 1 mm.
© Thomas Witzke

Gravegliaite Image

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Gravegliaite: Mn++(SO3)·3(H2O)

Comments: Pale brownish prismatic crystals of gravegliaite on matrix.
Location: Gambatesa Mine, Val Graveglia, Genova, Liguria, Italy. Scale: Picture Size 1 mm.
© Thomas Witzke

Grechishchevite Image

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Grechishchevite: Hg3S2(Br,Cl,I)2

Comments: Red grechishchevite coatings on calcite.
Location: Kadyrel' Hg occurrence, Oorash-Khem River Valley, Uyuk Range, Pii-Khem District, Tuva Republic, Eastern-Siberian Region, Russia. Scale: Picture Size 2 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Grechishchevite Image

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Grechishchevite: Hg3S2(Br,Cl,I)2

Comments: Red grechishchevite coatings on calcite.
Location: Kadyrel' Hg occurrence, Oorash-Khem River Valley, Uyuk Range, Pii-Khem District, Tuva Republic, Eastern-Siberian Region, Russia. Scale: Picture Size 2 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Greenalite Image

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Greenalite: (Fe++,Fe+++)2-3Si2O5(OH)4

Comments: Dark olive-green massive greenalite with metallic galena.
Location: La Union Mine, Murcia, Spain. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Greenalite Image

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Greenalite: (Fe++,Fe+++)2-3Si2O5(OH)4

Comments: Dark olive-green massive greenalite with metallic galena.
Location: La Union Mine, Murcia, Spain. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Greenockite Image

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Greenockite: CdS

Comments: Brown, equant crystal of greenockite on prehnite.
Location: Summit, Union County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Greenockite Image

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Greenockite: CdS

Comments: Brown, equant crystal of greenockite on prehnite.
Location: Summit, Union County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gregoryite Image

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Gregoryite: (Na2,K2,Ca)CO3  
Nyerereite: Na2Ca(CO3)2

Comments: Sodium (nyereteite) and potassium (gregoryite) carbonates, not stable in normal atmosphere, collected molten from the volcano and maintained in inert argon atmosphere.
Location: Ol Doinyo Lengai Vulkan, Maasai Steppe, East Africa Rift Valley, Tanzania. See Link. Scale: Rock size 2 cm.
© Richard Dale / Dale Minerals

Gregoryite Image

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Gregoryite: (Na2,K2,Ca)CO3  
Nyerereite: Na2Ca(CO3)2

Comments: Sodium (nyereteite) and potassium (gregoryite) carbonates, not stable in normal atmosphere, collected molten from the volcano and maintained in inert argon atmosphere.
Location: Ol Doinyo Lengai Vulkan, Maasai Steppe, East Africa Rift Valley, Tanzania. See Link. Scale: Rock size 2 cm.
© Richard Dale / Dale Minerals

Greifensteinite Image

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Greifensteinite: Ca2Be4(Fe++,Mn)5(PO4)6(OH)4·6(H2O)

Comments: Tabular crystal of greifensteinite impaled on acicular tourmaline.
Location: Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Greifensteinite Image

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Greifensteinite: Ca2Be4(Fe++,Mn)5(PO4)6(OH)4·6(H2O)

Comments: Tabular crystal of greifensteinite impaled on acicular tourmaline.
Location: Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Greigite Image

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Greigite: Fe++Fe+++2S4

Comments: Radiating needles are colloidal greigite with plates of sulfur.
Location: Synthetic material. Scale: See Image.
© Electron Optics Image Gallery / University of Leeds

Greigite Image

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Greigite: Fe++Fe+++2S4

Comments: Radiating needles are colloidal greigite with plates of sulfur.
Location: Synthetic material. Scale: See Image.
© Electron Optics Image Gallery / University of Leeds

Griceite Image

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Griceite: LiF  
Villiaumite: NaF

Comments: White aggregates of griceite with pinkish villiaumite.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Québec, Canada. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Griceite Image

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Griceite: LiF  
Villiaumite: NaF

Comments: White aggregates of griceite with pinkish villiaumite.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Québec, Canada. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag
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