“How did they carve granite to within a fraction of an inch tolerance, when today it requires special tools?”
That one is easy. The Sphinx and the great pyramids are made of limestone, not granite.
That’s absolutely untrue. The walls and sarcophaguses are made of granite. Just google on youtube and you’ll see this.
True Limestone was also used, in fact, it’s said that at one time the entire outside was limestone, pure white in color, but a variety of different stone materials were used.
How did they plate the gold? Don’t you need a current to do that?
Actually taking another look at building materials might be in order here. Pretty sure they used both. And the Granite they used has very high piezo electric qualities. While the Limestone has insulating qualities. By design for some reason?