Shop our vast selection of Radiant Cut, 3 Carat diamonds and build the perfect ring today. All of Ritani's high quality loose diamonds are evaluated by the GIA or AGSL, complete with a detailed grading and certification report. After you've chosen the perfect one, browse our large inventory of ring setting options, such as the diamond halo engagement ring or the timeless solitaire setting. Contact our free virtual gemologist or our skillful New York based customer service team if you need help or guidance while choosing and purchasing your diamond. We have partnered with local jewelry stores across the US so that you can see your loose diamond or designer jewelry in person and try before you buy.