's Image Gallery

Richterite: Na(CaNa)(Mg,Fe++)5[Si8O22](OH)2  
Calzirtite: CaZr3TiO9  
Augite: (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6

Comments: Gray irregular grain of calzirtite (see arrow) in fibrous augite with dark red richterite.
Location: Jacupiranga Mine, Cajati, Sao Paulo, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Richterite: Na(CaNa)(Mg,Fe++)5[Si8O22](OH)2

Comments: Richterite crystal in tan calcite.
Location: Bancroft, Ontario, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rickardite: Cu7Te5  
Cameronite: AgCu7Te10  
Vulcanite: CuTe

Comments: Gray metallic massive cameronite showing subconchoidal fracture associated with purple rickardite and bronzy plates of vulcanite in a mass of tellurium, co-type specimen.
Location: Good Hope mine, Vulcan District, Gunnison County, Colorado, USA. Scale: See Image.
© Rruff Database

Riebeckite: [ ]Na2(Fe++3Fe+++2)Si8O22(OH)2

Comments: Grayish black, coniform, massive crystals of riebeckite.
Location: Cape Province, South Africa. Scale: 8x6 cm.
© Dave Barthelmy

Rilandite: (Cr,Al)6SiO11·5(H2O) (?)

Comments: Dark brown opaque resinous rilandite cleavage fragment.
Location: J. L. Riland Claim, near Meeker, Rio Blanco County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rimkorolgite: Mg5Ba(PO4)4·8(H2O)

Comments: Pinkish flesh-colored crystals of rimkorolgite in matrix.
Location: Kovdor Massif, Kola Peninsula, Russia. Scale: Specimen Size 25x17x8 mm.
© Sergey Vasiliev / Systematic Mineralogy

Ringwoodite: Mg2SiO4  
Lingunite: (Na,Ca)AlSi3O8  
Majorite: Mg3(Fe,Al,Si)2(SiO4)3

Comments: BSE image showing chondritic xenoliths and impact melt veins of lingunite (Lgt). Olivine (Olv), pyroxene (Pyx), maskelynite (Ms glass), ringwoodite (Rgt), and majorite (Mjt). Meteoritics & Planetary Science 43, No 5, 823-828 (2008).
Location: Polished thin section of the Sixiangkou meteorite. Scale: See Image.
© Meteoritics & Planetary Science

Rinkite: Na(Na,Ca)2(Ca,Ce)4(Ti,Nb)(Si2O7)2(O,F)2

Comments: Hexagonal prismatic crystals of rinkite in nepheline-syenite pegmatite matrix. Associated with orthoclase, black aegirine and minor eudialyte.
Location: Takhtarvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Specimen Size 7x3.5x2.5 cm..
© Pavel M. Kartashov

Rinmanite: (Zn,Mn)2Sb2Mg2Fe4O14(OH)2

Comments: A. Specimen with carbonates (white), amphibole (reddish) and franklinite–rinmanite (dark spots). B. Same specimen illuminated with UV light (254 nm). Note the orange-red carbonate fluorescence.
Location: Garpenberg Norra Zn-Pb mine, Hedemora, Dalarna, in south-central Sweden. (CanMin, v39:1675). Scale: Specimen Size 5 cm wide.
© Canadian Mineralogist

Rinmanite: (Zn,Mn)2Sb2Mg2Fe4O14(OH)2  
Franklinite: (Zn,Mn++,Fe++)(Fe+++,Mn+++)2O4

Comments: B&W image (reflected light) of a polished section of rinmanite and franklinite (white) with associated silicates.
Location: Garpenberg Norra Zn-Pb mine, Hedemora, Dalarna, in south-central Sweden. (CanMin, v39:1675). Scale: Scale Bar 0.2 mm.
© Canadian Mineralogist

Rinneite: K3NaFe++Cl6  
Carnallite: KMgCl3·6(H2O)

Comments: Orange to light brown rinneite with colorless carnallite.
Location: Merkers, Bad Salzungen, Rhön, Thuringia, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Rittmannite: Mn++Mn++Fe++Al2(OH)2(PO4)4·8(H2O)

Comments: SEM image of rittmannite crystals on massive adularia. (CanMin, v27:447).
Location: Found in altered phosphatic "nodules" from the Mangualde granitic pegmatite, Portugal. Scale: 240 X.
© Canadian Mineralogist

Rittmannite: Mn++Mn++Fe++Al2(OH)2(PO4)4·8(H2O)

Comments: Light yellow, opaque, microcrystalline rittmannite on matrix.
Location: El Galineiro, Vigo, Pontevedra, Spain. Scale: Specimen Size 2.4 x 2.1 x 1.1 cm.
© John Veevaert

Rivadavite: Na6MgB24O40·22(H2O)

Comments: Translucent white rivadavite nodule with some adhering earthy material.
Location: Tincalayu, Salta Province, Argentina. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Riversideite: Ca5Si6O16(OH)2·2(H2O)

Comments: Opaque off-white finely fibrous riversideite veins in vesuvianite / grossular matrix.
Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Robertsite: Ca6Mn+++9(PO4)9O6(H2O)6·3(H2O)  
Carbonate-hydroxylapatite: Ca5(PO4,CO3)3(OH)  
Apatite: Ca5(PO4)3(OH,F,Cl)

Comments: Black crystals of Robertsite on pink carbonate-hydroxylapatite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Robinsonite: Pb4Sb6S13

Comments: Dark gray, prismatic-acicular crystals of robinsonite on white marble.
Location: Pitone Quarry, Seravezza, Lucca, Italy. Scale: Picture size 2 cm.
© Dave Barthelmy

Rockbridgeite: (Fe++,Mn)Fe+++4(PO4)3(OH)5

Comments: Black cruciform twins of rockbridgeite on siderite.
Location: Big Chief mine, Keystone, Pennington County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Rockbridgeite: (Fe++,Mn)Fe+++4(PO4)3(OH)5  
Stewartite: Mn++Fe+++2(PO4)2(OH)2·8(H2O)

Comments: Pointed, brownish yellow stewartite crystals on massive, dark rockbridgeite.
Location: Hagendorf, Bavaria, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Rockbridgeite: (Fe++,Mn)Fe+++4(PO4)3(OH)5  
Wilhelmvierlingite: CaMn++Fe+++(PO4)2(OH)·2(H2O)

Comments: Yellow brown crystals wilhelmvierlingite with black rockbridgeite.
Location: Hagendorf South Pegmatite (Cornelia Mine; Hagendorf South Open Cut), Waidhaus, Vohenstrauß, Oberpfalz, Bavaria, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag