My Dad and Mom first bought from Jewelry Exchange in San Francisco before moving to Phoenix. Jewelry Exchange has stores in most large cities in the U.S. and they guarantee that they have the lowest price or they will refund 120 percent of the difference Since they import their diamonds directly, they also guarantee that their jewelry will appraise for double the purchase price. They manufacture their own jewelry and you can pick out the diamond that you want and a setting and they will prepare it for you in a few days. They bought an engagement ring from Jewelry Exchange which had one of the small diamonds come off the ring a few days after the one year warranty expired. They still fixed it for free!