Gold diamond blue sapphire band ring

18k yellow gold, set with blue sapphire surrounded by diamonds.
N. 1 round shape composite cut sapphire ca. 11.50 ct.
Round shape brillant cut diamonds ca. 1.00 ct, G-H, VVS.
Front dimensions 25 x 20 mm.
IT ring size 13 - US ring size 6.5. Weight 15.5 g.
Item condition grading: **** good.