I've recently being working with a couple of jewelers, both photographing their products and designing their ads. Here are a couple of samples. The ad design shown here was actually not used, the final version was much simpler.
I'm now advertising on theknot.com, partyspot.com, and weddingchannel.com Feel free to take a look at my listings, they're under photographers for Los Angeles/Southern California. And don't forget to tell your friends!