Yellow gold (750) circular brooch with openwork and black enamel fillets, in the shape of a flower corolla, centered on a medallion with a quatrefoil decorated with old, brilliant or rose-cut diamonds, including five main ones, in claw or grain settings, in a radiating circle of petals engraved with leaves or punctuated with white half-pearls in claw setting on a striated background. Yellow gold pin (750), formerly removable. Second half of the 19th century. Transformations, notably on the reverse. Gross weight : 16,7 g. - Diameter : 4,3 cm. Some scratches, wear and jumps to the enamel, soldering tolerated on the reverse, chips and small chips to the diamonds, oxidation on the reverse.