You are viewing a fine quality 18K yellow gold and red enamel ring made in Italy in the 1920's. The ring measures 11 mm or just under 1/2" long up the finger by 19 mm or 3/4" across. Set on top is a natural pin fire Australian white Opal weighing around 2 1/2 carats. On the sides are beautiful quality gold and enamel work. The ring is marked 750 for 18k and has Italian gold standard hallmarks. The ring is a size 7 1/4 and cold be re-sized. The ring weighs 4.2 grams.