| http://www.w3.org/ns/prov#value | - You get a pile of rocks with a bit more Yttiribilium than the surrounding rocks and then you process it into a slurry with more Yttiribilium and then it goes off and gets smelted.There was an interesting article somewhere suggesting that the best way to do this in terms of minimizing mining and water waste was to crush the ore, separate the rare earths using magnets and getting the concentration u
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