I'm thinking maybe there should be a way to launch a rocket to get blackstones, or maybe a recipe that takes a lot of resources and then has a % chance of providing one blackstone. Finding them on the ground only is both anti-climactic and somewhat annoying when trying to automate everything.
Ahh, okay. I was thinking maybe something like you feed an assembler 10,000 coal and 100,000 sulfuric acid to make one blackstone or something like that. Maybe too simple, but still epic?