Art Deco European Diamond Engagement Ring in Platinum.  This beautiful Art Deco engagement ring features a .72 carat GIA certified Old European cut diamond set in platinum. The mounting of this ring is bold and curvy and full of flash, with its .24 carats of single cut diamonds set around the curving open spaces on the shoulders. A wonderful example of the ornate detail that was often expressed in Art Deco engagement rings, with milgrain detail surrounding all of the diamond sections.