You are viewing a fine quality 14K yellow gold custom made ring made in the 1980's. The ring measures 15 mm or 5/8" long up the finger by 18 mm or 3/4" across. Cut in a modified pear shape is a natural black Opal. The ring is marked: 14K. It is a size 6 and can be re-sized. The ring weighs 3.4 grams.