| soil | 0.59 |
| the earth's crust | 0.45 |
| rock | 0.40 |
| water | 0.33 |
| animal | 0.33 |
| meteorite | 0.33 |
| erythrite | 0.25 |
| glaucodot | 0.25 |
| skutterudite ores | 0.25 |
| save for small deposits | 0.45 |
| occur with copper | 0.41 |
| come with standard posi… | 0.36 |
| come with armrest-mount… | 0.36 |
| play a variety of roles | 0.36 |
| seek to build sharehold… | 0.35 |
| occur as only one stabl… | 0.33 |
| provide stability | 0.31 |
| begin drilling in the c… | 0.29 |
| begin drilling in 2017 | 0.29 |
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| compound | 0.49 |
| vulnerable supply chain | 0.46 |
| three significant north… | 0.38 |
| right | 0.33 |
| different coefficient o… | 0.29 |
| relative permeability | 0.25 |
| a rating of 5 | 0.25 |
| essential | 0.68 |
| harder than platinum | 0.53 |
| ferromagnetic | 0.48 |
| softer | 0.44 |
| hard | 0.36 |
| rare | 0.36 |
| toxic | 0.31 |
| valuable | 0.29 |
| more transparent | 0.29 |
| resistant | 0.29 |
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| a chemical element | 0.61 |
| a by-product metal | 0.58 |
| metal | 0.51 |
| essential element | 0.49 |
| essential trace element | 0.40 |
| shiny, brittle metal | 0.38 |
| a transition metal | 0.36 |
| hard metal | 0.35 |
| an emerging sector | 0.46 |
| mined | 0.75 |
| used in battery | 0.71 |
| produced as a by | 0.70 |
| sourced | 0.67 |
| required by applicable … | 0.64 |
| used in detistry and ar… | 0.62 |
| mined by child | 0.56 |
| mined in congo | 0.56 |
| mined in the drc | 0.55 |
| used in lithium-ion bat… | 0.54 |
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