I just sold over 100 Flawless Square Emeralds on the AH... for 6,000~ each, if I am remembering right.
Rubies, Topaz, and Amethysts... do not sell for quite that much.
I'm noticing there's a few things with these stupid high values on the AH, but not only that, people obviously have bots setup to buy them en mass. Why is that? Especially when they are a gem that so commonly drops in Inferno mode? I'd like to know some of the formulas behind some of these odd occurrences on the AH, as they do not seem at all economically smart on the surface, but obviously, they must be to some degree deep within, yes?