Shop our wide selection of Round Cut, Ideal diamonds and build the perfect engagement 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. Once you've discovered the stone that's best for you, shop our wide range of engagement ring settings and metals, including stylish platinum styles. Our superb customer service team and free gemologist service will lend any assistance or advice you need during the selection process. Ritani partners with local jewelers all over the United States so you can preview your engagement ring in-person, for free.