Ring with fine, yellow Ceylon sapphire 27.93 ct, not heated

Ring with a yellow Ceylon sapphire 27.93 ct, no heat. surrounded by 18 brilliant-cut diamonds totalling ca. 2.5 ct, ca. RW (G)/VVS, WG/GG 18K, 14.8 g, ring size 52, 21st century good condition, GRS certificate no.: GRS2022-107130 from 10/2022 enclosed.