18k white gold, set with oval blue sapphire approx. 9.63 ct surrounded by round brilliant cut diamond frame and and tapered-cut diamond ribbons approx. 6.63 ct, E-F, VVS-VS. Hallmarked "750".
US size 7.5 - IT size 16. Front dimensions 35 x 30 mm. Weight 30.6 g.
Item condition grading: ***** excellent.