Select and preview your Oval Cut, F Color diamond at one of our respected nationwide jewelers (US only). When you buy from us, you can be assured your diamond was ethically sourced and certified by either the GIA or AGSL. After you select the stone that's right for you, complete your ring with a style from our diverse selection of ring settings, from timeless solitaires to sparkling antique halos. For expert advice while your shopping, you can question our gemologist or helpful customer service team. We have partnered with local jewelry stores across the US so that you can see your loose diamond or engagement ring in person and try before you buy.