materials

Gold and Silver

Gold and Silver in .9999 quality is used to manufacture blanks in fine gold and in fine silver

currently used alloys are based on Ag with a fineness of .925 / .835 / .500 / .333

currently used alloys are based on Au with a fineness of .917 / .750 / .585 / .375 / .333

Copper in .99 quality is used for the production of blanks in pure copper

currently used alloys are Cu/Zn-brass, Cu/Sn-bronze and CuNi25