18k yellow gold pendant brooch featuring a blue-enameled rosette set with old-cut brilliant-cut diamonds, cabochon sapphires and orange verroteries, the metal needle. French master mark, partially legible: hippocampe D. Worked in the mid-19th century in the neo-Renaissance style (horsehead hallmark 1838-1919). Total height: 6 cm - Diameter: 4.3 cm Gross weight : 26,8 g