You are viewing a fine quality 18K yellow gold ring from the 1960's. The ring measures 21 mm or just under 1" long up the finger by 18 mm or 3/4" across. It is set with an untreated natural Apple Green marquise cut Jade stone. The ring is marked 18K. It is a size 6 and can be re-sized. The ring weighs 4 grams.