What exactly are they talking about when they say “rare earth?” Are they talking specific minerals? Yes, I could google this, but it comes back with stuff I don’t understand. Like, for example, why is rare earth only found some places (and don’t tell me “because it is rare!”). If it is just a collection of minerals, can the minerals not be found independently. Basically, I don’t understand what makes rare earth different from other things like gold or silver or diamonds or whatever.
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