Burma ruby diamond gold ring

18k white gold, embellished by a central ruby surrounded by two rows of diamonds. 
N. 01 ruby, octagonal shaped, step cut, approx. 8.90 ct. Geographic origin: Myanmar (Burma). No indication of heating.
N. 52 round shaped diamonds, huit huit cut, approx. 1.50 ct, I-J, SI.
Hallmarked "750". IT size 16 - US size 7 1/2. Front size 2.4 x 1.8 cm. Weight 12.7 g.
Item condition grading: **** good.
This lot is accompanied by Technical Expertise issued by the Master Stones laboratory.