You are viewing a very fine gem quality large flame Opal ring. The ring measures 34 mm or over 1 1/4" long up the finger by 18 mm or 3/4" across. The Opal measures 30 mm by 11 mm;and, weighs around 10-12 carats. The ring is marked: 750 for 18K and has an Italian maker's mark. The ring is a size 6 1/2 and can be re-sized. The ring weighs 11.4 grams.