Nobody suggested they were not made by Egyptians. You made that up, too.
We don't know which generation of Egyptians did the top quality work. As already noted, inscriptions only establish a lower bound on age, but no upper bound. Evidence strongly suggests the means to do such work were lost, early on.
"Machined" describes the precision of the work. If you know how to get that without precision equipment, reveal it.
We don't know which generation of Egyptians did the top quality work. As already noted, inscriptions only establish a lower bound on age, but no upper bound. Evidence strongly suggests the means to do such work were lost, early on.
"Machined" describes the precision of the work. If you know how to get that without precision equipment, reveal it.