| south africa | 0.25 |
| brazil | 0.25 |
| australia | 0.25 |
| recover by mining | 0.29 |
| extract the elements of… | 0.25 |
| concentrated | 0.50 |
| rich | 0.26 |
| deep | 0.26 |
| mined | 0.82 |
| separated | 0.47 |
| processed | 0.46 |
| removed | 0.45 |
| mixed with palladium | 0.43 |
| mixed with platinum | 0.40 |
| mixed with gold | 0.39 |
| smelted | 0.35 |
| reduced by coke | 0.32 |
| reduced | 0.29 |
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