Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| Riebeckite | ☐Na2(FeII3FeIII2)Si8O22(OH)2 | Riebeckite root name group | — | 0 | 0 | — | Mineral, Hydroxide , Silicate | |
| Riebeckite root name group | ◻[Na2][ZII3FeIII2]Si8O22(OH,F,Cl)2 | Sodium amphibole | Magnesio-riebeckite, Fluoro-riebeckite, Riebeckite | 0 | 0 | — | Group , Silicate | |
| Riesite | TiO2 | Titanium dioxide | — | 0 | 0 | — | Mineral, Simple oxide | |
| Roedderite | KNaMg2(Mg3Si12)O30 | Osumilite (group) | — | 0 | 0 | — | Mineral, Silicate | |
| Roméite (group) | A2(SbV)2O6Z | Pyrochlore (supergroup) | Oxycalcioroméite, Oxyplumboroméite, Hydroxyferroroméite, Fluorcalcioroméite, Hydroxycalcioroméite | 0 | 0 | — | Group | |
| Rondorfite | Ca8Mg(SiO4)4Cl2 | — | — | 4 | 0 | — | Mineral, Silicate | |
| Rooseveltite | Bi(AsO4) | Monazite (group) | — | 0 | 0 | — | Arsenate , Mineral | |
| Rorisite | CaClF | — | — | 1 | 0 | — | Mineral, Halide | |
| Rosickýite | S | — | — | 0 | 0 | — | Mineral | |
| Rossmanite | ☐(Al2Li)Al6(Si6O18)(BO3)3(OH)3(OH) | Tourmaline | — | 0 | 0 | — | Mineral, Aluminosilicate , Borate , Hydroxide | |
| Rubicline | Rb(AlSi3O8) | Alkali feldspar | — | 0 | 0 | — | Mineral, Aluminosilicate | |
| Rubidium | Rb | — | — | 9 | 0 | — | Element | |
| Rubidium chloride | RbCl | — | — | 1 | 0 | — | Synthetic , Compound, Halide | |
| Rubidium titanyl phosphate | RbTiOPO4 | — | — | 0 | 0 | — | Orthophosphate , Phosphate , Synthetic , Compound, Titanate | |
| Ruby | Al2O3 | Corundum | — | 1 | 1 | CL/SEM | Variety, Simple oxide |
