You are viewing a fine quality 18K yellow gold ring made in the 1960's. The ring measures 20 mm or just over 3/4" up the finger by 22 mm across. The moss in snow Jade measures 20 mm by 13 mm. The Jade is natural and untreated. The ring is marked both: 750 and 18K. It is a size 7. The ring weighs 9.9 grams.