Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| 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 | |
| Rudashevskyite | (Fe,Zn)S | Sphalerite (group) | — | 0 | 0 | — | Mineral, Sulphide | |
| Ruthenium | Ru | — | — | 8 | 2 | SXES | Metal , Mineral , Element | |
| Rutherfordine | UO2(CO3) | — | — | 4 | 0 | — | Uranyl , Mineral, Carbonate | |
| Rutile | TiO2 | Rutile (group), Titanium dioxide | Strüverite, Ilmenorutile | 2 | 5 | CL, CL/SEM, EDS, SXES | Mineral, Simple oxide | |
| Rutile (group) | MIVO2, M=Ge,Sn,Te,Pb,Mn,Ti,Si,Fe,Sb | — | Stishovite, Rutile, Pyrolusite, Paratellurite, Plattnerite, Cassiterite, Tripuhyite, Argutite | 0 | 0 | — | Group , Simple oxide |
