Mineral Specimen Images (R)

Rondorfite: Ca8Mg(SiO4)4Cl2

Comments: Brown to orange, shiny, massive rondorfite in matrix.
Location: Bellerberg, Eifel, Germany. Scale: Not Given.
© Diederik Visser

Rondorfite: Ca8Mg(SiO4)4Cl2  
Kumtyubeite: Ca5(SiO4)2F2  
Srebrodolskite: Ca2Fe+++2O5  
Wadalite: Ca6Al5Si2O16Cl3

Comments: BSE image of kumtyubeite (Kmt) associated with srebrodolskite (Srb), bultfonteinite (Blt), Ca- kydrosilicates, wadalite (Wad), rondorfite (Rndr), and ettringite (dark gray). (AmMin, v94:1361).
Location: Rock-forming mineral found in skarn carbonate-xenoliths in ignimbrites of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia. Scale: See Image.
© American Mineralogist

Ronneburgite: K2MnV4O12

Comments: Reddish-brown crystals of ronneburgite on matrix.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Rontgenite-(Ce): Ca2(Ce,La)3(CO3)5F3

Comments: Gemmy and lustrous rontgenite-(Ce) crystals to 1.5 mm on an albite matrix.
Location: Narsarsuk, Igaliko, Greenland. Scale: 3.7 x 1.5 cm.
© John Veevaert

Rontgenite-(Ce): Ca2(Ce,La)3(CO3)5F3  
Thorbastnasite: Th(Ca,Ce)(CO3)2F2·3(H2O)

Comments: Tny white, acicular thorbastnasite crystals to less than 1 mm in sprays. The thorbastnasite forms the cores the 'needles', with white epitaxial rontgenite-(Ce) coating.
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Needle Size < 1 mm.
© William Lechner / Dakota Matrix

Rooseveltite: BiAsO4

Comments: Gray glassy crystalline rooseveltite with purple fluorite.
Location: Josef Fluorite Mine, Krune Hora Mountains, near Teplice, Seversocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Roquesite: CuInS2

Comments: Polished section (PPL) showing bluish-gray, anhedral roquesite grains in violet-gray bornite, with blue covellite veinlets.
Location: Charrier, Allier, France. Scale: Picture size 0.7 mm.
© Thomas Witzke

Rorisite: (Ca,Mg)FCl

Comments: Colorless to white tabular crystals of Rorisite. Rorisite is extremely hygroscopic and must be stored in closed vials. The picture was made through the vial.
Location: Kopeisk, Chelyabinsk Oblast', Urals Region, Russia. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Rosasite: (Cu,Zn)2(CO3)(OH)2

Comments: Rosasite on malachite after azurite. Blocky crystals of azurite to 2.5 cm in size, completely altered to malachite, then coated by pale sky-blue rosasite.
Location: Silver Bill mine, Gleeson, Cochise Co., Arizona, USA. Scale: 4 x 7.5 x 2 cm.
© Dan Weinrich

Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)  
Hurlbutite: CaBe2(PO4)2

Comments: White, round crystal clusters of hurlbutite on reddish brown roscherite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)  
Parafransoletite: Ca3Be2(PO4)2(PO3,OH)2·4(H2O)

Comments: White, crystalline aggregate sprays of parafransoletite on dark reddish brown roscherite with massive, white, sucrosic whitlockite.
Location: Tip Top mine, Custer County, South Dakota, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)  
Englishite: K3Na2Ca10Al15(PO4)21(OH)7·26(H2O)

Comments: Black crystalline aggregate of roscherite on white englishite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)  
Viitaniemiite: Na(Ca,Mn++)Al(PO4)(F,OH)3

Comments: Colorless to pink viitaniemiite with brownish roscherite.
Location: Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)  
Ushkovite: MgFe+++2(PO4)2(OH)2·8(H2O)

Comments: Translucent ushkovite microcrystals with orange roscherite on feldspar.
Location: Galileia, Minas Gerais, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Roscoelite: K(V,Al,Mg)2AlSi3O10(OH)2

Comments: Dull olive green fine grained roscoelite cementing sandstone.
Location: Rifle Mine, Garfield County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Roscoelite: K(V,Al,Mg)2AlSi3O10(OH)2  
Zincochromite: ZnCr2O4

Comments: Roscoelite segregation filled with rich impregnation zincochromite microcrystals (up to 60 vol.%). Metallic-white grains of clausthalite are visible. Inset polished section image shows crystals of zincochromite in chromceladonite matrix.
Location: Srednyaya Padma U-V deposit, Zaonezhie peninsula, Lake Onega, Karelia Republic, Northern Region, Russia. Scale: Specimen size is 6x4x4 cm.
© Pavel M. Kartashov

Roselite: Ca2(Co,Mg)(AsO4)2·2(H2O)

Comments: Gemmy crystals of roselite.
Location: Bou Azzer, Anti-Atlas Mts., Morocco. Scale: Crystal size 3 mm.
© John Veevaert

Roselite-beta: Ca2(Co,Mg)(AsO4)2·2(H2O)

Comments: Clear, rose-colored roselite-beta crystalline grains.
Location: Bou Azzer, Anti-Atlas Mountains, Morocco. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Roselite-beta: Ca2(Co,Mg)(AsO4)2·2(H2O)

Comments: Deep red, well crystallized roselite-beta covering a small pocket in white calcite.
Location: Ahrbar, Bou-Azzer area. Scale: 7 x 4 x 4.5 cm.
© Fabre Minerals

Rosenbergite: AlF3·3(H2O)

Comments: Colorless prismatic crystals of rosenbergite on a dark matrix.
Location: Cetine di Cotorniano Mine (Cetine Mine; Tafone Mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag