David Yurman - Châtelaine®18-Karat Gold, Turquoise And Diamond Ring - 5

David Yurman's 'Châtelaine®' collection combines the husband-and-wife duo's respective eye for sculpture and color. Crafted from 18-karat gold, this ring is prong-set with a cushion-cut turquoise and topped on all four corners with twinkling diamonds.