Vintage sapphire and diamond cluster ring

A vintage 18 carat yellow and white gold ring with an oval faceted dark blue sapphire in a single cut diamond halo. 

The sapphire measures 9 mm by 7 mm and is around a 3.15 carat stone. The 16 single cut diamonds are .32 carat in total, VS to SI1 in quality and H in color. 

The ring size is 17.00 mm, the size can be modified if necessary. 

The sapphire is a strong very dark blue color. There is some slight wear to the sapphire, otherwise the ring is in good condition.