Pompadour ring in yellow gold and opal

18k yellow gold (750/1000) ring set with an opal and diamonds. One cabochon-cut opal, weighing approximately 4.08 carats, surrounded by 36 brilliant-cut diamonds, each weighing approximately 0.10 carats (approximately 0.003 carats). Width at the top: 1.69 cm. Ring size: 51. Total weight: 4.92 g. Eagle's head hallmark. Excellent condition.