I made the carbuncle with the new furnace, and I can't open it until it cools down otherwise it cracks.
So by the time I took out the melting dish, the carbuncle inside was as hard as a rock. I tried drilling it thinking it will come out easy but no, after 30mins of drilling I barely got half a gram out, although it was a nice cinnabar color this time around.

Any ideas on how to take out the carbuncle and pulverize it?