Purchase at Ritani.com and ship your Round Cut, K Color diamond wedding ring to a local Ritani jewelry store near you (US only). 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 selected your perfect stone, choose from a diverse range of engagement ring styles, including 6 prong solitaire and three stone halo ring settings. If you bump into questions as you're selecting a diamond, try our virtual gemologist for live advice from a non-commissioned pro. Ritani partners with local jewelers all over the United States so you can preview your diamond in-person, for free.