Wonderful Georgian Moss Agate And Old Cut Diamond Ring.
A magical open backed cabochon moss agate surrounded by thirteen original old cut diamond stones set in rub over closed back silver settings.
The shank is yellow gold eighteen carat with foliate engraving on the shoulders.
It is a replacement.
 
Face measures - 18mm x 21mm
size - 7 and can be sized
weight - 6.3g
 
small scratch on dendritic. I can get it polished if you desire