Can anyone help me identify this necklace? My ex-boyfriend recently bought it for me. He wouldn't tell me where he bought it or how much it cost, but he did say he bought it from someplace nice (although he could have been lying, as he had a tendency to do). I really don't know that much about jewelry, and was just wondering if anyone could tell me where he might have purchased this necklace and its retail value.
Btw: Sorry the picture is so large/slightly blurry. I can take better pictures if needed. Thanks in advance!

Btw: Sorry the picture is so large/slightly blurry. I can take better pictures if needed. Thanks in advance!