Round White Cubic Zirconia and Lab Created Blue Sapphire Platinum over .925 Silver Engagement Ring Platinum Over Sterling Silver. Quality Stamp (.925) 7 Cubic Zirconia; 10 Sapphire Item Measures 21 mm Wide x 3 mm High x 9 mm Long. 2 mm Shank Width Style: Engagement/Anniversary. Imported A unique twist on classic bridal....emerald-cut lab created sapphires flank the generous center cubic zirconia stone. With round cz accents. 5.01 carats T.W. of glam. Platinum over sterling silver. Sizes 6-10.