1/2 Carat T.W. Princess- and Round-Cut Black Diamond Sterling Silver Engagement Ring: * Crafted in sterling silver * 1/2 ct. t.w. * Fancy black diamond color * Prong- and channel-set stones * Princess-cut diamond * Available in sizes 5-9 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.