Yellow gold, diamond and sapphire ring

18k yellow gold ring (750/1000). Oval-cut sapphire, total weight approximately 0.90 ct, surrounded by eight brilliant-cut diamonds, total weight approximately 0.20 ct (each diamond weighing approximately 0.025 ct). Width at the top: 0.90 cm. Ring size: 53. Total weight: 5.17 g. Eagle's head hallmark. Excellent condition.