Three Sided Round Diamond Engagement Ring Set 1.36ct. This bridal set features an round diamond in a three sided setting with a band custom made to fit like a glove. Ask us about options in natural diamonds and lab grown diamonds or if you would like to customize this ring for it to be the perfect match for her. As a family jeweler we work hard to make sure you get the best diamond quality and a world class shopping experience. Charleston Alexander Jewelers, Where Washington, Maryland & Virginia Get Engaged.