Keepsake Sylvia 5/8 Carat T.W. Diamond 10kt White Gold Engagement Ring: * 5/8 ct. t.w. * Round-cut double halo design * 10kt white gold * Available in sizes 5-8 Every piece of Walmart jewelry passes rigorous inspection at our Quality Assurance labs. So you can buy with confidence — guaranteed. Learn More Learn about diamonds, including the 4 C"s — Color, Cut, Clarity and Carat Weight.