Shop our vast selection of Asscher Cut, 0.5 Carat 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. Once you've discovered the stone that's right for you, shop our wide range of engagement ring settings and metals, including favored palladium styles. Our superb customer service team and free gemologist service will give any assistance or direction you need during the selection process. You can examine your diamond or finished wedding ring at any one of our regional jeweler partners, positioned all over the US.