Diamond brooch "Penguins". 18 ct white gold, sterling silver, copper, iron, blackened. Unique. Stylized semi-plastic representation of a penguin mother with her child from blackened iron. The white gold chest and head pavé-set with 382 diamonds in brilliant cut (13.12 ct) and 16 sapphires (total 0.97 ct) in color gradient from light yellow to orange, the inlaid beak of the mother from copper. Stamped: Fineness Au 750, Ag 925, Cu, Fe; maker's mark "GH", "Hemmerle". H 5.7 cm. Weight...