's Image Gallery

Radtkeite: Hg3S2ClI  
Corderoite: Hg3S2Cl2

Comments: SEM image of prismatic radtkeite crystals and equant corderoite crystals on quartz matrix. AmMin, v76:1715).
Location: McDermitt mercury mine, Humboldt County, Nevada, USA. Scale: Scale Bar 10 µm.
© American Mineralogist

Raguinite: TlFeS2

Comments: Murky gray-brown fine grained raguinite mass, intermixed with pyrite.
Location: Allchar, Macedonia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Raite: Na4Mn++4Si8(O,OH)24·9(H2O)

Comments: Golden raite crystals up to 2 mm long filling cavities in white microcline with minor lomonosovite and natrolite.
Location: Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: 7x4x3 cm.
© John Betts - Fine Minerals

Raite: Na4Mn++4Si8(O,OH)24·9(H2O)  
Mountainite: (Ca,Na2,K2)2Si4O10·3(H2O)

Comments: Bright white fibrous acicular mountainite crystal aggregate with pale golden raite.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

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

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: 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: (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: 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

Rancieite: (Ca,Mn++)Mn++++4O9·3(H2O)

Comments: Brown resinous rancieite veinlets in limonite / wad rock.
Location: Montmirat, Lozere, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rankamaite: (Na,K,Pb,Li)3(Ta,Nb,Al)11(O,OH)30

Comments: White, massive-fibrous rankamaite.
Location: Mumba, Kivu, Congo (Zaïre). Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Ransomite: CuFe+++2(SO4)4·6(H2O)

Comments: Pale bluish-green powdery ransomite.
Location: United Verde Mine, Jerome, Black Hills, Verde District, Yavapai Co., Arizona, USA. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Ranunculite: HAl(UO2)(PO4)(OH)3·4(H2O)

Comments: SEM image of nodular ranunculite showing the aggregates of lamellar crystals. (MinMag v43:327).
Location: Uranium-rich portions of a pegmatite mainly worked for beryl and columbite at Kobokobo, Kivu, Zaire. Scale: Picture Size 300 x.
© Mineralogical Magazine

Rapidcreekite: Ca2(SO4)(CO3)·4(H2O)

Comments: Colorless, radial-acicular crystals of rapidcreekite on matrix.
Location: Jeremias Glück Mine (Fairy Grotto), Garnsdorf, Saalfeld, Thuringia, Germany. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag