A-Z register
- Red Aventurine SiO₂
- Red Beryl Be₃Al₂Si₆O₁₈
- Rose Quartz SiO₂
- Rabbittite Ca3Mg3(U6+O2)2(CO3)6(OH)4·18H2O
- Rabejacite Ca2(U6+O2)4O4(S6+O4)2·8H2O
- Raberite Tl1+5Ag1+4As3+6Sb3+S2-15
- Radvaniceite GeS2-2
- Raisaite Cu2+Mg[Te6+O4(OH)2]·6H2O
- Ramikite-(Y) Li2Na6(Y,Ca,REE)3Zr4+3(PO4)6(CO3)2O2(OH,F)2
- Ranunculite Al(U6+O2)(PO3OH)(OH)3·4H2O
- Raslakite Na15Ca3Fe2+3(Na,Zr4+)3Zr4+3(Si,Nb5+)Si25O73(OH,H2O)3(Cl,OH)
- Realgar AsS
- Reyerite Na2Ca14Al2Si22O58(OH)8·6H2O
- Rhodium Rh
- Rhodostannite Cu1+(Fe2+0.5Sn4+1.5)S2-4
- Rickturnerite Pb2+7O4[Mg(OH)4](OH)Cl3
- Rietveldite Fe2+(U6+O2)(S6+O4)2(H2O)5
- Rigrahamite Na2Ca2Th2(CO3)4(HCO3)2(OH)4(H2O)7
- Rinkite-(Y) Ca2(CaY)Na(NaCa)Ti4+(Si2O7)2(OF)F2
- Rockbridgeite (Fe2+0.5Fe3+0.5)2Fe3+3(PO4)3(OH)5
- Rodalquilarite H3Fe3+2(Te4+O3)4Cl
- Rhodizite KAl4Be5B11O28
- Rhodochrosite Mn2+CO3
- Rhodonite CaMn2+3Mn2+Si5O15
- Rogermitchellite Na6Sr12Ba2Zr4+13Si39B6O123(OH)14·10H2O
- Romanorlovite K11Cu2+9Cl25(OH)4·2H2O
- Rosasite Cu2+Zn2+CO3(OH)2
- Rosenbergite AlF[F0.5(H2O)0.5]4·H2O
- Rosiaite Pb2+Sb5+2O6
- Roterbärite Cu1+Pd2+Bi3+Se2-3
- Roymillerite Pb2+24Mg9(Si10O28)(CO3)10(BO3)(SiO4)(OH)13O5
- Rubellite A(D₃)G₆(T₆O₁₈)(BO₃)₃X₃Z
- Ruby Al₂O₃
- Rudabányaite (Ag1+2Hg1+2)(As5+O4)Cl
- Rudenkoite Sr3Al3.5Si3.5O10(OH,O)8Cl2·H2O
- Rutile Ti4+O2