Enamel ring with diamond solitaire. 18k yellow gold. Band ring shank with royal blue guilloché enamel set with a diamond of approx. 0.6 ct in mixed cut (J/K, vs/si). Stamped: fineness 750, "Kern", numbered 8482. Enamel with a minimal point-like chipping. Ring size approx. 47. Weight 7.24 g. René Kern, Düsseldorf, 1980s.