Shaani, who appears once your realm reaches phase four, and the uncut, un-BoP gems sell for 15 Badges of Justice each. Or at least, that's what we thought. Sharp-eyed tipster Herid noticed that according to the Armory (screenshot above), the price of the gems is 10 Badges of Justice -- a 33% reduction in price before they even go on sale yet!
Of course, this could just be an Armory bug, so I did my level best to check it out for myself, by logging on to Proudmoore, the only server yet to have reached phase four. However, I learned that although Shaani spawns when phase four is activated, she doesn't sell gems until the Alchemy Lab is completed, much like Smith Hauthaa and the Anvil. So I can't confirm this with anything more than the Armory data at the moment. Proudmooreans, get going on Discovering your Roots, so we can uncover the truth of this gem-price-drop rumor.
If it's true, Badges of Justice might be worth more gold than we thought, depending on what the price of these epic gems stabilizes at.