Shop our certified Round Cut, 1.7 Carat loose diamonds to design your own custom engagement ring. Continue creating your custom engagement ring with one of our gleaming metal options or unique ring settings, from modern bezel settings to Art Deco-inspired halo engagement rings. Each of our diamonds is graded and certified by a reputable third-party agency, such as the GIA or AGSL. You can contact our customer service team or free virtual gemologist service for expert advice at any point in the buying process. Preview your custom wedding ring or diamond engagement ring for free at any of our authorized local jewelers.