Ralstonite NaxMgxAl2-x(F,OH)6·(H2O)
Realgar AsS
Rhodizite (K,Cs)Al4Be4(B,Be)12O28
RhodochrositeManganese spar
Dialogite
MnCO3
RhodoniteFowlerite
(Mn++,Fe++,Mg,Ca)SiO3
Rodalquilarite H3Fe+++2(Te++++O3)4Cl
Rontgenite-(Ce) Ca2(Ce,La)3(CO3)5F3
Rosasite (Cu,Zn)2(CO3)(OH)2
Roselite Ca2(Co,Mg)(AsO4)2·2(H2O)
Roselite-betaBeta-roselite
Ca2(Co,Mg)(AsO4)2·2(H2O)
Ruizite CaMn+++Si2O6(OH)·2(H2O)
Rutheniridosmine (Ir,Os,Ru)
Rutherfordine UO2(CO3)
RutileSagenite - reticulated
TiO2