Early 5-cent pieces weren’t made of nickel — instead crafted from either gold, silver or copper. The modern American ... Head nickel (1913-1938) and Jefferson nickel (1938-present).

Researchers from the U.S. Army Research Laboratory (ARL) and Lehigh University have developed a nanostructured copper alloy ...

A 10-coin set of Proof coins from the San Francisco Mint that includes 2025-S silver quarter dollars, dime and half dollar ...