I have purchased several pieces of jewelry from the auction site BIDZ.com.  It is a fun way to purchase jewelry, and if you are persistent, at great prices.  They all kinds of jewelry by different artists.  If you don't win a bid the first time, they might have the same item up shortly there after.  Be careful to read all the description of an item before you bid.... example... ring size.  You can have it resized for a price BUT, quite often they might have that item in your size later on.  Resizing will cost you.  I don't shop there every day but I do enjoy going to the site and checking...