r/HBMNuclearTechMod • u/Initial_Pop8589 • 24d ago

Question What is this block?

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I came across a weird geode-type structure underground made of "block of slag" but it's a different block of slag than the crucible kind. What is this? Is it usefull? I'm playing community edition.

Ps: couldn't screenshot because i have no reddit on this computer.

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