I originally thought this was 1970s  "cocktail" ring .  I cleaned it up and was surprised to find London circa 1907 hallmarks.  The ring is proportioned well with a step cut citrine, it has honey warm tones that catch the light nicely. What sets it apart from the 1970's cocktail rings is the detail open pierced scrollwork.  It has an elevated claw/prong setting.    It feels modern in scale while retaining all the delicacy and charm of the Edwardian period.  The setting is 9ct (375), with the London leopards head, Size S UK 9 USA and weighs 7g.