Important cameo on agate

Oval in shape, it represents a young woman in the antique style, her profile turned to the right. The cameo is very finely carved from an agate. It has an 18-carat yellow gold mount, horse's head hallmark. It presents a rope decoration alternating with fine pearls and fleur-de-lis enhanced with enamel. Dimensions: 6 cm X 5 cm Thickness: 2 cm Weight: 54.7. g French work from the Napoleon III period