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Reedmergnerite: NaBSi3O8
Comments: Peach colored crystalline reedmergnerite in quartz. Location: Dara-Pioz, Tien-Shan, Tadzhikistan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Reevesite: Ni6Fe+++2(CO3)(OH)16·4(H2O)
Comments: Green reevesite coatings on serpentinite rock. Location: Pacific Asbestos Corporation Mine, near Copperopolis, Tuolumne County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Reinhardbraunsite: Ca5(SiO4)2(OH,F)2 Brownmillerite: Ca2(Al,Fe+++)2O5
Comments: Pink crystalline reinhardbraunsite in brownmillerite. Location: Near Bellerberg, Eifel, Rheinland-Pflaz, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Renierite: (Cu,Zn)11(Ge,As)2Fe4S16
Comments: Dull dark orange tarnished renierite with brassy chalcopyrite. Location: Prince Leopold Mine, Kipushi, Shaba, Zaire. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Retgersite: NiSO4·6(H2O)
Comments: Pale blue powdery retgersite on rock. Location: Mina La Motte, near Frederocktown, Madison County, Missouri, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Retzian-(Nd): Mn2(Nd,Ce,La)(AsO4)(OH)4
Comments: Small crystal fragment of brown-orange retzian-(Nd), mounted on paper. Location: Sterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Scale: Not Given. © Jeff Weissman / Photographic Guide to Mineral Species
Rhenium: Re
Comments: Dark gray metallic rhenium flakes. Location: Transbaikalia Region, Chita District, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Rhodesite: KHCa2Si8O19·5(H2O)
Comments: Pearly white to tan rhodesite crusts. Location: Quarter-mile east of Trinity River, Trinity County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Rhomboclase: (H5O2)+Fe+++(SO4)2·2(H2O)
Comments: Platy crystal rhomboclase spray. Location: Rio Tinto, Andalucia, Spain. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Richellite: Ca3Fe+++10(PO4)8(OH)12·n(H2O)
Comments: Khaki-colored earthy richellite masses. Location: Richelle, near Vise, Liege, Belgium. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species