A BLACK OPAL AND DIAMOND RINGA BLACK OPAL AND DIAMOND RINGSet with a pear-shaped cabochon black opal, weighing 2.32 carats, in a ballerina setting of tapered baguette and round brilliant-cut diamond surround; estimated total diamond weight 2.24 carats; mounted in platinum; size 6Accompanied by a GRS report stating that natural black opal originates from Australia, play of color (orange, yellow, blue and green), with no indication of treatments. Report #GRS2022-018749, dated 24 January 2022. 2.32克拉天然未經處理澳洲黑蛋白石配鑽石戒指鑽石共重約2.24克拉,戒圍6,附GRS證書