Choose from our diverse range of Round Cut, 4 Carat diamonds so you can build the perfect engagement ring, pendant, or pair of stud earrings. When you buy from us, you can be sure your diamond was responsibly sourced and graded by either the GIA or AGSL. After you've chosen the perfect one, browse our large selection of ring setting options, such as the sophisticated halo engagement ring or the timeless solitaire setting. Our helpful customer service team and offer gemologist service will serve any assistance or advice you need during the selection process. You can preview your diamond or completed engagement ring at any one of our local jeweler partners, located all over the US.