Nebraska Revised Statute 8-1715
Chapter 8
8-1715.
Precious metal, defined.
Precious metal shall mean the following in either coin, bullion, or other form:
(1) Silver;
(2) Gold;
(3) Platinum;
(4) Palladium;
(5) Copper; and
(6) Such other items as the director may specify by rule, regulation, or order.