Shop our broad selection of Princess Cut, Si1 diamonds and build the perfect ring today. All Ritani diamonds have been examined by a third party rating agency, and come with a thorough certificate that guarantees their 4C grades are proper. You can start here with a diamond, or start with one of our gorgeous ring settings, including vintage-inspired halos and modern bezel settings. Our superb customer service team and free gemologist service will lend any assistance or advice you need during the selection process. When you've chosen your diamond or wedding ring, you can select to preview it in-person, for free, at one of our US based, local partner jewelers, from Los Angeles, CA to New York City.