1.16 Art Deco European Cut Diamond Engagement Ring in Platinum.  This glittering Art Deco engagement ring features a 1.16 carat Old European cut diamond in platinum. The nearly colorless, GIA-certified center stone has wide geometric facets and accented by eighteen petite natural diamonds. The mounting has a unique milgrain detail and structured design that is truly reminiscent of the Art Deco aesthetic. From the profile, the setting of this ring is truly impressive, with thoughtful embellishments that reach out onto the shoulders of the band.