Use our diamond education to learn about Radiant Cut, 5 Carat loose diamonds and build the perfect engagement ring she'll worship forever. All of Ritani's high quality loose diamonds are examined by the GIA or AGSL, complete with a detailed grading and certification report. After you select the stone that's right for you, complete your ring with a style from our diverse selection of ring settings, from simple solitaires to sparkling Art Deco-inspired halos. If you need help along the way, you may engage with our customer service team or virtual gemologist. You can preview your diamond or completed engagement ring at any one of our local jeweler partners, located all over the US.