Quality Jewelry Retailers?

Okay, so I need an ONLINE jewelry store to shop on. good quality, and (if possible) reasonable prices. I am looking in particular for any shop with a wide and/or beautiful emerald birthstone jewelry. the more links (good ones) you have, the more chance you have at getting BA. ALSO: if you can direct me to any specific, single (or maybe a few different ones, that's okay) piece of jewelry that looks very nice, that's helpful, too. I like plain and simple, mostly looking for a ring. A ring with just a thin silver band and a chunk of emerald on it with a few dazzly gems around it is perfect. thanks!