NIKOS KOULIS Oui 18-karat white gold, diamond and enamel ring

Say 'Oui' to Nikos Koulis' ring, whose fluid lines, Greek craftsmanship and Art Deco-inspired design make for a unique and timeless piece. It's cast from 18-karat white gold and tipped with black enamel. A baguette-cut 0.31-carat diamond is nestled neatly in at the opening.