Day 743: down another two levels and digging into the ore that’s here, looking for diamonds. I don’t think I’m low enough toward the core to find them yet — these planetesimals tend to be stingy with diamonds and other pressure-formed rocks because they don’t really form enough pressure at the outer layers of the mantle to form them. (They also don’t tend to have a hot molten core like, say, Earth, or Mars did many many moons ago, which does call into question where all the ducking lava is coming from…)
Anyway, discovered a seam that will have me digging up again tomorrow, because this is how mining works. The ore never runs the direction you want to go because that would be convenient and a planetesimal covered in zombies is definitely not trying to be convenient.