This is a Gents 9ct Yellow and White Gold Square shaped Round Brilliant Cut  Diamond set Rolex Style Ring.
There are 16 Diamonds in this ring. 
Pre-owned.
Hallmarked. 
Size: S
Weight: Approx 7.22g
Diamond Weight: approx 0.50 carats
Ring sizing is available upon request.
Sensible price offers will be considered. 
GENTSCOUNT.GS4.