Art Deco Diamond & Aquamarine Cocktail Ring in 18kThis original vintage cocktail ring is exquisitely constructed and incredibly unique. The center stone is a . 06 carat diamond set in a square housing. The true focal point of the ring are the four hexagon cut aquamarines that surround the center diamond. The hexagon cut stones then come together to form a polygon (8 sided) shape in a masterstroke of late art deco geometric design.