Trilogy ring in yellow gold, tourmaline and diamonds

18k yellow gold (750/1000) ring set with a tourmaline and diamonds. One oval-cut tourmaline, weighing approximately 1.13 ct, is flanked by two rectangular-cut diamonds, each weighing approximately 0.10 ct. The band measures 0.80 cm wide at the top and fits a ring size 53. The total weight is 3.20 g. Hallmarked with an owl. Excellent condition.