A diamond serpent brooch, consisting of old-cut round diamonds sizing from 4.8 mm to 1.3 mm, pavé-set on a white precious metal mount in a stylised snake-form, with marquise green stones mounted as eyes, fitted with a yellow metal hinged pin stem and safety catch, unmarked, approximately measuring 2.5 x 2.5 cm, total weight of item 5.5 grams.