Yeah I saw one guy put some kind of micrometer, a badass one that looked like it cost tens of thousands of dollars, on one of those granite sarcophagi to measure how smooth or flat it was across the entire surface. The digital readout went below the micrometers tolerance like 0.0000005 or some shit. It was the Serapeum of Saqqara, I believe. If I am explaining this badly, I think I am. Humans 10,000 BCE and prior knew how to do some mind blowing shit with super hard stone and on a massive scale. Our technology can't even measure how smooth it is. All we can do is stare, attempt to measure, and scratch our puny monkey brains. Another thing ancients did with granite that blows my fucking mind, the pottery. I know, I know people are like "what the fuck is so special about that bowl or that water jug". Well it's not special, it's a god damn miracle by our standards and it should not exist according to the archaeological authorities.
They could make GRANITE less than a fucking centimeter thick WITHOUT BREAKING THE SHIT, in any design they wanted. If you know anything about metallurgy or geology, you know different materials have different mass, hardness, brittleness, etc. There have been artifacts found in Columbia made from diorite, if I am remembering correctly, that stone is just unworkable to modern day humans. No one can recreate any of this, much less explain how the fuck they moved stones weighing in at over 1000 tons and they moved them over 500 miles sometimes. My theory is they used some kind of liquid or acid, some kind of badass alchemy that was lost to time. It's like they could turn stone to into fucking playdoh, shape into whatever, then turn it back into stone. Anyways, there are so many civilizations underwater right now that mainstream academia just refuses to acknowledge. I used to think it was because they were lazy and didn't want to rewrite their precious history. Now I am beginning to see this shit is being hidden for a reason.