Platinum black opal, diamond, and sapphire ring. The prong style head features 1 fine black opal, that measures 14.5x17.8mm. Based on the measurements the opal weighs approximately 13.00 carats. 4 round diamonds weighing approximately 62/100 carats total, and 6 baguette cut sapphires weighing approximately 1.20 carats total flank the center stone. The ring weighs 7.1 dwts, and is a size 6 ½.