Browse our sparkling selection of Oval Cut, J Color loose diamonds and build a gorgeous custom engagement ring today. When you have selected your stone, you can match it with a stylish ring setting in the metal of your choice, with colors ranging from rose gold to platinum. All of our products come with their own certification reports from the GIA or AGSL, the most reputable gemstone grading agencies. If you run into any questions during your purchase, you can consult our detailed diamond education or get expert advice from our virtual gemologist. When the selection process is complete, you can preview your diamond or custom bridal jewelry for free at any of our authorized local jewelers.