Let me find the source videos again and I will get them to you, there are several on this exact topic. But all my bookmarks are in the old computer. There are indeed some examples of stone work so fine and exact that they are deemed by the stone experts it would be impossible for us to reproduce even now with power tools. The only thing close would be lasers.
Years ago, when I was in middle school I saw a video with a knock off line that stones in S. America were softened with a flower. Don’t remember much else about the movie, but did find more references with convincing (to me) evidence that the conventional explanation has a few lacking points.
http://davidpratt.info/andes2.htm
The pictures are striking.
DK
We can do anything with the power tools of today. We can even put signatures in LEDs on semiconductor substrates. That is beyond merely polishing any substance or making things at the visible level.