20 CT AUSTRALIAN ANDAMOOKA CRYSTAL OPAL PENDANT: 14K yellow gold pendant with one 20.46 ct. pear shaped cabochon cut crystal opal. Blue/Green pinfire play-of-color. Brightness level: 2.5. Heavy accent of 19 round brilliant diamonds, approx. .80 ctw, rated VS in clarity and G-H color. The opal and diamonds are prong set. 14k yellow gold 16'' chain. 20.1 grams.