Brooch. Gold, horn. Brooch. Gold 750 samples, copper, shakudo - traditional Japanese alloy consisting of copper with 2-6% adding gold. Gold, copper, shakudo, schibuichi - an alloy of silver with copper, in which copper is at least 30% Brooch. Gold, copper, Shibuichi. Brooch. Gold, copper, shakudo. Brooch. Gold, silver, shakudo, copper. Brooch. Gold, Shibuichi, pure silver. Gold, moonstone, horn. Gold, horn. Gold, silver of several samples. Gold, Shakudo, sterling silver, copper.