Take two stones of similar roughness and rub them together for many, many hours. Eventually you'll have to flat surfaces that fit almost perfectly together. Beyond that, it's not hard to see how some skilled craftsmen with some knowledge of geometry (and lots of laborers and a royal mandate) could construct what the Inca did.

What they built is incredibly impressive, but you don't need to invoke magic woo to explain it.

It doesn't take many many hours. I saw a TV documentary on it, it can be done in a half hour with stones the size of a box of kleenex. The archaeologist would also add sand in between the two surfaces to speed it up.

How will you do that to stones of granite, quartz or stishovite ? Several authors and experts of all kind say what you said and what the article states are completely unfeasible.