The second verb is... khusi that means to erect, to build, to construct, and you see that the verb has a determinative that is a man pounding somethi… - Joseph Davidovits

Mykerinos has a core... of agglomerated limestone and the first steps were covered with a casing... also made of split granite, not dressed [not cut].

[T]here is one theory that is never taught by Egyptology, but which is obvious. I call it Theorem Number One. The stone has a religious meaning. Stone is used only for tombs, pyramids and temples. Stone is never used for secular constructions, never for palaces, garrison, houses that are made out of wood, clay, brick, never in stone, except during the Greek period... and during the Roman occupation. So never, during the genuine Egyptian civilization, was the use of stone permitted for secular constructions.

reacts with lime and water to produce caustic soda, the main ingredient for alchemically making stone. An abundance of lime would have been available by calcining in simple hearths.