Shop our extensive selection of Asscher Cut, I Color 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. When you've found your gemstone, you can then peruse our large selection of engagement ring settings and metal types, such as platinum or rose gold. Use our virtual gemologist or customer service team to further support you if you want professional assistance. Visit one of our national jeweler partners, located across the country, to take advantage of our free in-store preview program and see your unmounted diamond or wedding ring in person (US only).