Cubic zirconia 3 ct. t.w. simulated diamond stud earrings from DiamonArt® will add touches of sparkle to every outfit. Cubic Zirconia: Metal: Sterling silver Metal Color: White Stones: Simulated diamond 3 ct. t.w. diamond equivalent DiamonArt® jewelry is of the finest quality thanks to the patented polishing system of applying diamond dust to add more luster and shine. Carat (ct.) total weight (t.w.) represents the approximate total weight of diamonds or equivalent appearance.