Cocktail ring with opal and diamonds. 18k white gold, yellow gold. Displayed floral pierced ring set with 47 brilliant-cut diamonds (total approx. 1.2 ct, I/J, VS), 12 navette-cut diamonds (total approx. 1.56 ct, I/J, VS) and 25 octagonal diamonds. The ring head with an oval opal cabochon (approx. 12.2 x 12.5 x 4.4 cm, green-blue-yellow color play) in claw setting from yellow gold. Stamped: fineness 750, 'Kern'. Size 46. Weight 14.8 g. René Kern, Düsseldorf, 1970s.