Round cut engagement rings feature round brilliant cut diamonds. A round cut diamond engagement ring is a traditional choice when popping the question. Compared to other diamond cuts, the round brilliant cut has the least amount of crystal lost and reflects light well, resulting in its strong popularity for engagement rings. Ross-Simons features a beautiful collection of round brilliant cut diamond engagement rings. Styles include solitaire, 3-stone, halo and more. We're sure you'll find your ideal round cut diamond engagement ring shopping with us.