Welcome to the horde! In true fashion we present the Mad Viking jewelry collection. Custom crafted to our specifications, Mad Viking jewelry makes a perfect gift for that metal head, biker, and Mad Viking. Order yours today! Most of our jewelry is made from German or Nickel Silver. German silver is a copper alloy with nickel and often zinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance, but it contains no elemental silver unless plated. It is extensively used because of its hardness and resistance to corrosion.