A fiery GIA certified, I color, Si1 clarity round brilliant cut .51 carat diamond rises from the center of this magnificent antique platinum engagement ring. Ribbons of diamond baguettes and round cut diamonds drape down the shoulders and sides of this Art Deco ring. The ring is further adorned with an elegant organic engraving and measures 8.66 mm in width. Circa: 1920. Size 4. We can re-size slightly.