[vitally3643]

I'm pretty sure we've conclusively answered these questions. Hand tools, skill, and absolutely unreasonable amounts of time and patience.

Any master stoneworker from any era should be able to carve stone to that level of precision given enough time and reason. The problem, as always, is that there is usually very little reason to put in that amount of time and effort when you can get 90% as good for 50% the effort.

[inglor_cz]

Can experimental archaeology actually replicate this? If not, I don't find the speculation, even though logical, to be conclusive.

[dgellow]

Yes