Mineral Specimen Images (R)

Mineral Specimen Images (R)
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Mineral Specimen Images (R) With 348 Images

Rajite Image

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Rajite: CuTe++++2O5

Comments: Bluish green coating of rajite on matrix.
Location: Lone Pine mine, Catron Co., New Mexico, USA. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Rajite Image

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Rajite: CuTe++++2O5

Comments: Bluish green coating of rajite on matrix.
Location: Lone Pine mine, Catron Co., New Mexico, USA. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Ralstonite Image

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Ralstonite: NaxMgxAl2-x(F,OH)6·(H2O)  
Cryolite: Na3AlF6

Comments: Massive cryolite with solution cavities lined with octahedral ralstonite crystals.
Location: Ivigtut, Greenland. Scale: Picture size 0.5 cm.
© John Veevaert

Ralstonite Image

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

Ralstonite Image

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Ralstonite: NaxMgxAl2-x(F,OH)6·(H2O)  
Cryolite: Na3AlF6

Comments: Massive cryolite with solution cavities lined with octahedral ralstonite crystals.
Location: Ivigtut, Greenland. Scale: Picture size 0.5 cm.
© John Veevaert

Ralstonite Image

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

Ramanite-(Rb) Image

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Ramanite-(Rb): Rb[B5O6(OH)4]·2H2O  
Ramanite-(Cs): Cs[B5O6(OH)4]·2H2O  
Santite: KB5O6(OH)4·2(H2O)

Comments: Unheated Type-B melt inclusions in graphic quartz. 1 = ramanite-(Cs), 2 = sassolite, 3 = ramanite-(Rb), 4 = santite, 5 = topaz, V = vapor. (AmMin, v93:1035).
Location: Graphic pegmatite quartz from the Island of Elba, Italy. Scale: Scale Bar 15µm.
© American Mineralogist

Ramanite-(Rb) Image

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Ramanite-(Rb): Rb[B5O6(OH)4]·2H2O  
Ramanite-(Cs): Cs[B5O6(OH)4]·2H2O  
Santite: KB5O6(OH)4·2(H2O)

Comments: Unheated Type-B melt inclusions in graphic quartz. 1 = ramanite-(Cs), 2 = sassolite, 3 = ramanite-(Rb), 4 = santite, 5 = topaz, V = vapor. (AmMin, v93:1035).
Location: Graphic pegmatite quartz from the Island of Elba, Italy. Scale: Scale Bar 15µm.
© American Mineralogist

Rambergite Image

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Rambergite: MnS

Comments: Dark reddish-brown rambergite mass in matrix.
Location: Ronneberg, Thuringen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rambergite Image

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Rambergite: MnS

Comments: Dark reddish-brown rambergite mass in matrix.
Location: Ronneberg, Thuringen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rambergite Image

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Rambergite: MnS  
Hauerite: MnS2

Comments: Small black octahedral crystals of hauerite with small brown crystals of rambergite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 0.8 mm.
© Thomas Witzke / Abraxas-Verlag

Rambergite Image

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Rambergite: MnS  
Hauerite: MnS2

Comments: Small black octahedral crystals of hauerite with small brown crystals of rambergite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 0.8 mm.
© Thomas Witzke / Abraxas-Verlag

Rameauite Image

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Rameauite: K2CaU++++++6O20·9(H2O)

Comments: Yellow crystals of rameauite on matrix.
Location: Marignac, Compreignac, Haute Vienne, France. Scale: Picture Size 4 mm.
© Thomas Witzke

Rameauite Image

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Rameauite: K2CaU++++++6O20·9(H2O)

Comments: Yellow crystals of rameauite on matrix.
Location: Marignac, Compreignac, Haute Vienne, France. Scale: Picture Size 4 mm.
© Thomas Witzke

Rammelsbergite Image

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Rammelsbergite: NiAs2

Comments: Dull gray metallic botryoidal rammelsbergite aggregate with crystalline surface.
Location: Hudson Bay Mine, Rusty Lake, Gowganda, Ontario, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rammelsbergite Image

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Rammelsbergite: NiAs2

Comments: Dull gray metallic botryoidal rammelsbergite aggregate with crystalline surface.
Location: Hudson Bay Mine, Rusty Lake, Gowganda, Ontario, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ramsbeckite Image

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Ramsbeckite: (Cu,Zn)15(SO4)4(OH)22·6(H2O)

Comments: Green crystals of ramsbeckite on matrix.
Location: Gelbe Birke Mine, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Ramsbeckite Image

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Ramsbeckite: (Cu,Zn)15(SO4)4(OH)22·6(H2O)

Comments: Green crystals of ramsbeckite on matrix.
Location: Gelbe Birke Mine, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Ramsdellite Image

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Ramsdellite: MnO2

Comments: Large mass of radiating ramsdellite crystals with terminated crystals.
Location: Lake Valley District, Sierra Co., New Mexico, USA. Scale: 11x10x8 cm.
© John Betts - Fine Minerals

Ramsdellite Image

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Ramsdellite: MnO2

Comments: Large mass of radiating ramsdellite crystals with terminated crystals.
Location: Lake Valley District, Sierra Co., New Mexico, USA. Scale: 11x10x8 cm.
© John Betts - Fine Minerals
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