Shop our vast selection of Round Cut, 0.5 Carat diamonds and build the perfect ring today. All Ritani products are conflict free and come with a grading report from the trusted diamond agencies GIA or AGSL. Once you've selected your perfect stone, choose from a diverse range of engagement ring styles, including antique solitaire and pave halo ring settings. Use our customer service team and virtual gemologist to help assist you if you want experienced assistance. 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 Los Angeles, CA to New York City.