system
A chat on 4chan
human
pretty sure they had a way of carving easily into stone
gpt
Chert is hard. If the answer was as simple as 'its all just geopolymer' then they would have made the mould perfect rather than the odd shapes that chert naturally forms in
human
I think realistically it may have been a hybrid approach.

They make the rock, like the greywracke or the granite, incredibly hot, and they sculpted it as it cooled

though that paleo magnetic investigation of the pyramids is the smoking gun for me in geopoly, the only way all the stones get the same magnetic alignment is if they were cast there, if they were quarried they'd all be different