| 0 | RAITE (Hydrated Sodium Calcium Manganese Titanium Iron Silicate Hydroxide)
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| 0 | RAMMELSBERGITE (Nickel Arsenide)
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| 0 | RAMSDELLITE (Manganese Oxide)
|
| Sale! 1 | REALGAR (Arsenic Sulfide)
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| 0 | RHABDOPHANE (Hydrated Cerium Lanthanum Neodymium Phosphate)
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| 0 | RHENIITE (Rhenium Sulfide)
|
| 0 | RHODIZITE (Potassium Cesium Beryllium Aluminum Borate)
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| Sale! 2 | RHODOCHROSITE (Manganese Carbonate)
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| 0 | RHODOLITE (variety of PYROPE garnet, Magnesium Aluminum Silicate)
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| Sale! 1 | RHODONITE (Manganese Iron Magnesium Calcium Silicate)
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| 0 | RICHTERITE (Sodium Calcium Magnesium Iron Silicate Hydroxide)
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| 0 | RIEBECKITE (Sodium Iron Magnesium Silicate Hydroxide)
|
| Sale! 3 | ROCK_CRYSTAL (variety of Quartz- Silicon Oxide)
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| 0 | ROCKBRIDGEITE (Iron Manganese Phosphate Hydroxide)
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| 0 | ROMANECHITE (Hydrated Barium Manganese Oxide)
|
| Sale! 1 | ROSASITE (Copper Zinc Carbonate Hydroxide)
|
| 0 | ROSE_QUARTZ (variety of Quartz- Silicon Oxide)
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| 0 | ROSELITE (Hydrated Calcium Cobalt Magnesium Arsenate)
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| Sale! 2 | RUBY (variety of Corundum- Aluminum Oxide)
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| 0 | RUTILE (Titanium Oxide)
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