This Art Deco cocktail ring features a two-tone construction of 14 karat yellow gold and 14 karat white gold with a .50 carat old European cut diamond. The diamond features H color and SI2 clarity while being held in white gold bar prongs and bezel setting that contrasts beautifully with the yellow gold band. An oval-shaped black onyx adds dramatic color depth to the design, creating the bold geometric contrast that defined Art Deco jewelry.