I am usually pretty leery of these type of recommendations but I was looking for some jewelry for my wife, so an acquaintance recommended here.
We get there and after getting through security you end up in a nice showroom. They explain emeralds, how they come to be, are mined, and processed. Interesting.
Then they show you their stuff (loose emeralds, jewelry, etc.) Its nice but a high end. You would really have to want a very nice emerald to buy there.