I assume it would not be one process common to all of them, but more like with some you will have to mine additional stuff like Thorium which you have nothing

I assume it would not be one process common to all of them, but more like with some you will have to mine additional stuff like Thorium which you have nothing to do with later, or you will have to wash them with other chemicals and stuff to separate them, sometimes they are radioactive themselves etc... tedious in any case