Just in case you missed the thread in RT, I wanted to let you know about James Allen's new beta site. It includes gemstones and you can do a cool 360 degree view of them. It's addicting!
Just for another few weeks until the site is live. The diamonds are such fun to play with, but the gems (emeralds, rubies, yellow, pink and blue sapphires) look terrible! I imagine its actually just the lighting but it's too bad because I would love this kind of view before buying a stone. It is so helpful for evaluating the cut. Hopefully that's a quirk that will be worked out soon!