Shop our vast selection of Cushion Cut, 0.6 Carat diamonds and build the perfect ring today. Each and every loose diamond from Ritani comes with a report from the AGSL or GIA and is ethically sourced. Once you've selected your perfect stone, choose from a diverse range of engagement ring styles, including four prong solitaire and split shank halo ring settings. For expert advice while your shopping, you can question our gemologist or helpful customer service team. You can examine your diamond or finished wedding ring at any one of our regional jeweler partners, positioned all over the US.