Shop our broad selection of Cushion Cut, 1 Carat diamonds and build the perfect ring today. Each and every loose diamond from Ritani comes with a report from the AGSL or GIA and is ethically sourced. After you select the stone that's right for you, complete your ring with a style from our diverse selection of ring settings, from classic solitaires to sparkling vintage halos. Our excellent customer service team and expert gemologist service will provide any assistance or guidance 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 San Jose, CA to New York City.