Marquise ring in yellow gold and sapphire

Ring set with a sapphire and diamonds. In 18k yellow gold (750/1000). One oval-cut sapphire, weighing approximately 0.33 ct, and four brilliant-cut diamonds, with a total weight of approximately 0.12 ct (each diamond weighing approximately 0.03 ct). Width at the top: 1.80 cm. Ring size: 54. Total weight: 3.16 g. Owl hallmark. Excellent condition.