inho, the builders of all the various pyramids and ancient structures had methods of manipulating sound/ultrasonics and used wave interference patterns to shape/break/trim materials.

i also suspect they had methods of creating molten rock, or were able to heat rock enough to be more maleable and the temp control to keep the rock from just becoming a blob.

...wonder if there was an Annunnaki/Nephalim version of Harbor Freight, whose discount prices have been lost in the mists of antiquity.