A FINE ANTIQUE SAPPHIRE, EMERALD AND DIAMOND PEACOCK FEATHER BROOCH, LATE 19TH CENTURY in yellow gold and silver, in the manner of Boucheron, designed as the tail feather of a peacock, the plumes jewelled with old cut and rose cut diamonds, centring an oval cabochon blue sapphire within concentric borders of old cut diamonds and cushion cut emeralds, apparently unsigned, no assay marks, stamped inventory number, 4.8cm, 7.0g.