Art Deco Cushion Cut Diamond Engagement Ring w/ Sapphire Accents.  This Art Deco engagement ring features a .68 cushion cut diamond set in platinum and adorned with sapphire accents. The design of this ring is absolutely mesmerizing, with a look that appears to be woven across the top of the band with the sapphire accents providing the perfect amount of contrast and depth. The profile is high off the finger but eases up to the center stone in a very gradual way.