Can't find Jet or Plumbite
Right, I am having the same problem. I can't find the Jet or Plumbite! :'( I haven't tried any secret locations, as I don't know where they are, but I've been digging for about 3-4 days on the hunt. I...
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I think I got jet in Selvadora. I also got it from a lightning hit.
Having completed most of the collections in the game, I've concluded that the last item you need, whether 'common', 'uncommon' or 'rare' will be impossible to find. You will spend days looking for it. I finally got a diamond by accompanying my scientist Sim to work (there are lots of spawners in the secret science area). Later, I visited Selvadora and got diamonds by the truckful, only because I no longer wanted one.
Having completed most of the collections in the game, I've concluded that the last item you need, whether 'common', 'uncommon' or 'rare' will be impossible to find. You will spend days looking for it. I finally got a diamond by accompanying my scientist Sim to work (there are lots of spawners in the secret science area). Later, I visited Selvadora and got diamonds by the truckful, only because I no longer wanted one.
