Yellow gold, ruby ​​and diamond ring

Ring set with a ruby ​​and diamonds. In 18k yellow gold (750/1000). One square-cut ruby, weighing approximately 0.03 ct, surrounded by ten brilliant-cut diamonds, weighing approximately 0.28 ct each. Two diamonds weighing approximately 0.04 ct each, and eight diamonds weighing approximately 0.025 ct each. Width at the top: 1.55 cm. Ring size: 49. Total weight: 3.16 g. Owl hallmark. Excellent condition.