I have a hunch that the heirs could find a buyer(s) for some of these items through advertising on social media. Some of those items you mentioned may have a worthy value. Just a guess!!!
I agree! Who knows… these minerals may be worth something. Since the estate does not provide for legal assistance and the heirs are anxious to cash in, divide the assets and give them the option of keeping the minerals or offer to buy them out. (Put it all on paper and have notarized.) In my opinion, it’s a wealthy person who owns land and its minerals, regardless of the size or how much.
Good luck,