Emerald ring from Blue Nile

[TwilightBlue]

I found a setting I absolutely love on Blue Nile. I want an emerald in emerald cut which of course they have but I am concerned about the quality of the emerald. Has anyone purchased an emerald from Blue Nile? There isn't a lot of information on the stone and they don't seem to be able to tell me much more either. I'd like some feedback on this company and what their quality is like. Thanks.