Mineral Specimen Images (G)

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

Graeserite Image

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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 Image

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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

Graftonite Image

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Graftonite: (Fe++,Mn,Ca)3(PO4)2  
Heterosite: Fe+++PO4

Comments: Whitish graftonite intergrown with dark purple to brown heterosite.
Location: Grafton, Grafton County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Graftonite Image

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Graftonite: (Fe++,Mn,Ca)3(PO4)2  
Heterosite: Fe+++PO4

Comments: Whitish graftonite intergrown with dark purple to brown heterosite.
Location: Grafton, Grafton County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gramaccioliite-(Y) Image

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Gramaccioliite-(Y): (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38

Comments: Black, metallic rystals of gramaccioliite-(Y) in matrix.
Location: Sambuco, Pianche di Vinazio, Piemont, Italy. Scale: Picture size 1.3 mm..
© Thomas Witzke

Gramaccioliite-(Y) Image

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Gramaccioliite-(Y): (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38

Comments: Black, metallic rystals of gramaccioliite-(Y) in matrix.
Location: Sambuco, Pianche di Vinazio, Piemont, Italy. Scale: Picture size 1.3 mm..
© Thomas Witzke

Grandidierite Image

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Grandidierite: (Mg,Fe++)Al3(BO4)(SiO4)O

Comments: Translucent blue-green crystalline grandidierite in pegmatite.
Location: Vohibola, Madagascar. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Grandidierite Image

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Grandidierite: (Mg,Fe++)Al3(BO4)(SiO4)O

Comments: Translucent blue-green crystalline grandidierite in pegmatite.
Location: Vohibola, Madagascar. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Grandidierite Image

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Grandidierite: (Mg,Fe++)Al3(BO4)(SiO4)O  
Boralsilite: Al16B6Si2O27

Comments: B&W PPL image of aggregates of boralsilite in quartz near grandidierite. Pyrite is partially replaced by oxide. Abbrev: A+B = Secondary andalusite, B = boralsilite, G = grandidierite, P = pyrite, Q = quartz. (AmMin v93:294).
Location: Pegmatites from the Larsemann Hills, East Antarctica. Scale: See Image.
© American Mineralogist

Grandidierite Image

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Grandidierite: (Mg,Fe++)Al3(BO4)(SiO4)O  
Boralsilite: Al16B6Si2O27

Comments: B&W PPL image of aggregates of boralsilite in quartz near grandidierite. Pyrite is partially replaced by oxide. Abbrev: A+B = Secondary andalusite, B = boralsilite, G = grandidierite, P = pyrite, Q = quartz. (AmMin v93:294).
Location: Pegmatites from the Larsemann Hills, East Antarctica. Scale: See Image.
© American Mineralogist

Grandviewite Image

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Grandviewite: Cu3Al9(SO4)2(OH)29

Comments: Light blue sprays of fibrous grandviewite crystals associated with blue cyanotrichite.
Location: Grand View mine, Coconino County, Arizona, USA. Scale: See Image.
© George Stevens, Malcom Alter/RRUFF

Grandviewite Image

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Grandviewite: Cu3Al9(SO4)2(OH)29

Comments: Light blue sprays of fibrous grandviewite crystals associated with blue cyanotrichite.
Location: Grand View mine, Coconino County, Arizona, USA. Scale: See Image.
© George Stevens, Malcom Alter/RRUFF

Grantsite Image

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Grantsite: Na4CaxV++++2xV+++++12-2xO32·8(H2O)  
Tyuyamunite: Ca(UO2)2V2O8·5-8(H2O)

Comments: Dark olive green waxy coatings of grantsite with greenish-yellow tyuyamunite and sandstone.
Location: F-33 Mine, near Grants, Valencia County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Grantsite Image

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Grantsite: Na4CaxV++++2xV+++++12-2xO32·8(H2O)  
Tyuyamunite: Ca(UO2)2V2O8·5-8(H2O)

Comments: Dark olive green waxy coatings of grantsite with greenish-yellow tyuyamunite and sandstone.
Location: F-33 Mine, near Grants, Valencia County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Graphite Image

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Graphite: C

Comments: Black, sub-hexagonal crystal of graphite in calcite.
Location: Lead Hill Mine, (near Ticonderoga), Essex Co., New York, USA. Scale: Crystal size 1 mm.
© Paul M. Schumacher

Graphite Image

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Graphite: C

Comments: Black, sub-hexagonal crystal of graphite in calcite.
Location: Lead Hill Mine, (near Ticonderoga), Essex Co., New York, USA. Scale: Crystal size 1 mm.
© Paul M. Schumacher

Graphite Image

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Graphite: C

Comments: A crystal of graphite in gneiss.
Location: Forchheim, Pockau, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Graphite Image

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Graphite: C

Comments: A crystal of graphite in gneiss.
Location: Forchheim, Pockau, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Gratonite Image

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Gratonite: Pb9As4S15

Comments: Crystal cluster of gratonite. The largest crystal is 2.5 mm across.
Location: Excelsior mine, Cerro de Pasco, Pasco dept., Peru. Scale: 1.5 x 1 cm.
© John Veevaert

Gratonite Image

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Gratonite: Pb9As4S15

Comments: Crystal cluster of gratonite. The largest crystal is 2.5 mm across.
Location: Excelsior mine, Cerro de Pasco, Pasco dept., Peru. Scale: 1.5 x 1 cm.
© John Veevaert
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