A luminous .65 carat, H color, Si1 clarity round cut diamond is set in the center of this amazing antique platinum engagement ring. A collar of diamond frosted cutwork surrounds the brilliant center stone. Additional diamonds and organic engraving adorn the rings shoulders and sides. The Art Deco ring measures 9.18 mm in width. Circa: 1930. Size 4 3/4. We can re-size.