Shop our broad selection of Cushion Cut, I Color diamonds and build the perfect ring today. All Ritani diamonds have been evaluated by a third party rating agency, and come with a comprehensive certificate that guarantees their 4C grades are correct. 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. For expert advice while your shopping, you can question our gemologist or helpful customer service team. Ritani partners with local jewelers all over the United States so you can preview your engagement ring in-person, for free.