This is a gorgeous vintage 9ct gold square signet ring with a central starburst natural 0.2ct emerald. The shoulders have lovely sunburst detailing. A little thinning to the bottom of the shank but still very wearable and in lovely vintage condition. 
 
Material: 9ct gold. Fully hallmarked.
Weight: 2.8g
Size: UK O / US 7.25
Measurements: Face of the ring measures 9mm by 9mm
Assayed: Birmingham
Sponsor mark: TAD