An 18th century diamond and enamel 'carnival' ring

An 18th century diamond and enamel 'carnival' ring
The hinged locket bezel modelled as a mask with open mouth, with painted enamel detail and rose-cut diamond-set eyes and fluted design reverse, to rose-cut diamond single stone shoulders the hoop with black enamel and engraved legend Je Cache Mes Amours (I hide my loves) circa 1760, finger size F