| raadeite | Mg7(PO4)2(OH)8 |
| rabbittite | Ca3Mg3(UO2)2(CO3)6(OH)4·18H2O |
| rabejacite | Ca(UO2)4(SO4)2(OH)6·6H2O |
| radhakrishnaite | PbTe3(Cl,S)2 |
| radtkeite | Hg2S2ClI |
| raguinite | TlFeS2 |
| raite | Na4Mn3Si8(O,OH)24·9H2O |
| rajite | CuTe2O5 |
| ralstonite | NaXMgXAl2-X(F,OH)6·H2O |
| rambergite | MnS |
| ramdohrite | Ag3Pb6Sb11S24 |
| rameauite | K2CaU6O20·9H2O |
| rammelsbergite | NiAs2 |
| ramsayite | lorenzenite |
| ramsbeckite | (Cu,Zn)15(SO4)4(OH)22·6H2O |
| ramsdellite | MnO2 |
| rancieite | (Ca,Mn)Mn4O9·3H2O |
| rankachite | CaFeV4W8O36·12H2O |
| rankamaite | (Na,K,Pb,Li)3(Ta,Nb,Al)11(O,OH)30 |
| rankinite | Ca3Si2O7 |
| ransomite | CuFe2(SO4)4·6H2O |
| ranunculite | HAlUO2PO4(OH)3·4H2O |
| rapidcreekite | Ca2(SO4)(CO3)·4H2O |
| rashleighite | turquoise |
| raspite | PbWO4 |
| rasvumite | KFe2S3 |
| rathite | (Pb,Tl)3As5S10 |
| rauenthalite | Ca3(AsO4)2·10H2O |
| rauvite | Ca(UO2)2V10O28·16H2O |
| ravatite | C14H10 |
| rayite | (Ag,Tl)2Pb8Sb8S21 |
| realgar | AsS |
| realgar-alpha | AsS |
| rebulite | Tl5Sb5As8S22 |
| rectorite | a clay mineral |
| reddingite | Mn3(PO4)2·3H2O |
| redingtonite | (Fe,Mg,Ni)(Cr,Al)2(SO4)4·22H2O |
| redledgeite | BaTi6Cr2O16·H2O |
| reederite-(Y) | Na15Y2(CO3)9SO3FCl |
| reedmergnerite | NaBSi3O8 |
| reevesite | Ni6Fe2CO3(OH)16·4H2O |
| refikite | C20H32O2 |
| reichenbachite | Cu5(PO4)2(OH)4 |
| reinerite | Zn3(AsO3)2 |
| reinhardbraunsite | Ca5(SiO4)2(OH,F)2 |
| remondite-(Ce) | Na3(Ce,La,Ca,Na,Sr)3(CO3)5 |
| renardite | Pb(UO2)4(PO4)2(OH)4·7H2O |
| renierite | (Cu,Zn)11(Ge,As)2Fe4S16 |
| reppiaite | Mn5(VO4)2(OH)4 |
| retgersite | NiSO4·6H2O |
| reticite | kyanite |
| retzian-(Ce) | Mn2CeAsO4(OH)4 |
| retzian-(La) | (Mn,Mg)2(La,Ce,Nd)AsO4(OH)4 |
| retzian-(Nd) | Mn2(Nd,Ce,La)AsO4(OH)4 |
| revdite | Na16[Si4O6(OH)5]2[Si8O15(OH)6](OH)10·28H2O |
| reyerite | (Na,K)2Ca14(Si,Al)24O58(OH)8·6H2O |
| rezbanyite | a mixture |
| rhabdophane-(Ce) | (Ce,La)PO4·H2O |
| rhabdophane-(La) | (La,Ce)PO4·H2O |
| rhabdophane-(Nd) | (Nd,Ce,La)PO4·H2O |
| rhabdophane group | |
| rheniite | ReS2 |
| rhenium | Re |
| rhodarsenide | (Rh,Pd)2As |
| rhodesite | KHCa2Si8O19·5H2O |
| rhodium | (Rh,Pt) |
| rhodizite | (K,Cs)Al4Be4(B,Be)12O28 |
| rhodochrosite | MnCO3 |
| rhodonite | MnSiO3 |
| rhodostannite | Cu2FeSn3S8 |
| rhodplumsite | Pb2Rh3S2 |
| rhoenite | Ca2(Mg,Fe2+,Fe3+,Ti)6(Si,Al)6O20 |
| rhomboclase | HFe(SO4)2·4H2O |
| ribbeite | (Mn,Mg)5(SiO4)2(OH)2 |
| richellite | Ca3Fe10(PO4)8(OH,F)12·nH2O |
| richelsdorfite | Ca2Cu5Sb(AsO4)4Cl(OH)6·6H2O |
| richetite | PbU4O13·4H2O |
| richterite | Na2CaMg5Si8O22(OH)2 |
| rickardite | Cu7Te5 |
| riebeckite | Na2Fe3Fe2Si8O22(OH)2 |
| rilandite | (Cr,Al)6SiO11·5H2O |
| rimkorolgite | (Mg,Mn)5(Ba,Sr,Ca)(PO4)4·8H2O |
| ringwoodite | (Mg,Fe)2SiO4 |
| rinkite | mosandrite |
| rinneite | K3NaFeCl6 |
| ripidolite | chloritoid |
| risorite | fergusonite-(Y) |
| rittmannite | (Mn,Ca)Mn(Fe,Mn)2(Al,Fe)2(PO4)4(OH)2·8H2O |
| rivadavite | Na6MgB24O40·22H2O |
| riversideite | Ca5Si6O16(OH)2·2H2O |
| roaldite | Fe4N |
| robertsite | Ca2Mn3(PO4)3O2·2H2O |
| robinsonite | Pb4Sb6S13 |
| rockbridgeite | (Fe,Mn)Fe4(PO4)3(OH)5 |
| rodalquilarite | H3Fe2(TeO3)4Cl |
| rodolicoite | FePO4 |
| roeblingite | Pb2Ca6Mn(Si6O18)(SO4)2(OH)2·4H2O |
| roedderite | (Na,K)2(Mg,Fe)5Si12O30 |
| roentgenite-(Ce) | Ca2(Ce,La)3(CO3)5F3 |
| roepperite | fayalite |
| roesslerite | MgHAsO4·7H2O |
| roggianite | Ca2BeAl2Si4O13(OH)2·<2.5H2O |
| rohaite | TlCu5SbS2 |
| rokuhnite | FeCl2·2H2O |
| romanechite | (Ba,H2O)2(Mn4+,Mn3+)5O10 |
| romanite | (U,Pb)(Ti,Fe2+,Fe3+)21O38 |
| romarchite | SnO |
| romeite | (Ca,Fe,Mn,Na)2(Sb,Ti)2O6(O,OH,F) |
| romerite | FeFe2(SO4)4·14H2O |
| rondorfite | Ca8Mg(SiO4)4Cl2 |
| rooseveltite | BiAsO4 |
| roquesite | CuInS2 |
| rorisite | CaFCl |
| rosasite | (Cu,Zn)2CO3(OH)2 |
| rosasite group | |
| roscherite | Ca(Mn,Fe)2Be3(PO4)3·2H2O |
| roscoelite | KV2AlSi3O10(OH)2 |
| roselite | Ca2(Co,Mg)(AsO4)2·2H2O |
| roselite group | |
| roselite-beta | Ca2Co(AsO4)2·2H2O |
| rosemaryite | (Na,Ca,Mn)(Mn,Fe)(Fe3+,Fe2+,Mg)Al(PO4)3 |
| rosenbergite | AlF3·3H2O |
| rosenbuschite | (Ca,Na)3(Zr,Ti)Si2O8F |
| rosenhahnite | Ca3Si3O8(OH)2 |
| roshchinite | Ag19Pb10Sb51S96 |
| rosiaite | PbSb2O6 |
| rosickyite | S |
| rosieresite | lead copper aluminum hydrated phosphate |
| rossite | CaV2O6·4H2O |
| rossmanite | LiAl2Al6(BO3)3Si6O18(OH)4 |
| rostite | AlSO4(OH,F)·5H2O |
| roubaultite | Cu2(UO2)3(CO3)2O2(OH)2·4H2O |
| rouseite | Pb2Mn(AsO3)2·2H2O |
| routhierite | (Tl,Cu)Hg(As,Sb)S3 |
| rouvilleite | Na3Ca2(CO3)3F |
| roweite | Ca2Mn2B4O7(OH)6 |
| rowlandite-(Y) | Y4FeSi4O14F2 |
| roxbyite | Cu9S5 |
| rozenite | FeSO4·4H2O |
| rozenite group | |
| ruarsite | RuAsS |
| rubellane | biotite |
| rubellite | elbaite |
| rubicline | (Rb,K)AlSi3O8 |
| ruby | corundum |
| rucklidgeite | (Bi,Pb)3Te4 |
| ruitenbergite | Ca9B26O34(OH)24Cl4·13H2O |
| ruizite | CaMnSi2O6(OH)·2H2O |
| rusakovite | (Fe,Al)5(VO4,PO4)2(OH)9·3H2O |
| russellite | Bi2WO6 |
| rustenburgite | (Pt,Pd)3Sn |
| rustumite | Ca10(Si2O7)2SiO4Cl2(OH)2 |
| ruthenarsenite | (Ru,Ni)As |
| rutheniridosmine | (Ir,Os,Ru) |
| ruthenium | Ru |
| ruthenosmiridium | iridium |
| rutherfordine | UO2CO3 |
| rutile | TiO2 |
| rutile group | |
| rynersonite | Ca(Ta,Nb)2O6 |