I usually get "what are those stones?" I think they are obviously emeralds, but now that I know about tsavs and green sapphires (thanks PS CS) I guess it is fair. Although I do get asked if it is jade rather often. Eh Personally, I see all that as a gateway question to take a closer look.
I have had some oblique questions ala is it real, more like "oh that looks like an antique," insinuating it is a reproduction or something about the stone. I chalk it up to the old cut. Ironically, when I wear it abroad I know people.think it is fake, which is fine by me.
I agree with the other posters that for many the question is about expense, how did he afford that or what not. I'm not going to tell but I can guarentee it was less than some of my co-workers MRB solitaires.