Circular brooch in 18k yellow gold presenting a piece of blood jasper cut in a quatrefoil pattern, centered with fine pearls (one missing), the surround designed with chased coiled strands, four partially black-enameled clasps (minor knocks and chips). Second Empire (1852-1870), horsehead hallmark (1838-1919). Diameter: 4.5 cm Gross weight: 16.4 g