| Sale! 1 | RAITE (Hydrated Sodium Calcium Manganese Titanium Iron Silicate Hydroxide) |
| Sale! 1 | RAMMELSBERGITE (Nickel Arsenide) |
| 0 | RAMSDELLITE (Manganese Oxide) |
| Sale! 1 | REALGAR (Arsenic Sulfide) |
| 0 | RHABDOPHANE (Hydrated Cerium Lanthanum Neodymium Phosphate) |
| 0 | RHENIITE (Rhenium Sulfide) |
| 0 | RHODIZITE (Potassium Cesium Beryllium Aluminum Borate) |
| Sale! 4 | RHODOCHROSITE (Manganese Carbonate) |
| 0 | RHODOLITE (variety of PYROPE garnet, Magnesium Aluminum Silicate) |
| 0 | RHODONITE (Manganese Iron Magnesium Calcium Silicate) |
| 0 | RICHTERITE (Sodium Calcium Magnesium Iron Silicate Hydroxide) |
| Sale! 1 | RIEBECKITE (Sodium Iron Magnesium Silicate Hydroxide) |
| 0 | ROCK_CRYSTAL (variety of Quartz- Silicon Oxide) |
| 0 | ROCKBRIDGEITE (Iron Manganese Phosphate Hydroxide) |
| 0 | ROMANECHITE (Hydrated Barium Manganese Oxide) |
| 0 | ROSASITE (Copper Zinc Carbonate Hydroxide) |
| Sale! 1 | ROSE_QUARTZ (variety of Quartz- Silicon Oxide) |
| 0 | ROSELITE (Hydrated Calcium Cobalt Magnesium Arsenate) |
| Sale! 3 | RUBY (variety of Corundum- Aluminum Oxide) |
| 0 | RUTILE (Titanium Oxide) |