Gorgeous 18K Yellow Gold Opal and Diamond Cocktail Ring. Featuring an oval opal that measures (mm) length 14.73, width 12.61, 0.50 carats of round brilliant cut diamonds and 0.35 carats of tapered baguette diamonds. Stamped 750 on the inside of the band. Extremely beautiful play of color that looks different depending on the angle and lighting. The ring can be sized or worn with a ring guard. Measurements are approximate; see photos. This lovely ring comes with a generic ring box. Very good condition. Faint scratches on gold. Size 7 1/2