The 2016 $5 American Eagle gold bullion coins are some of the most sought-after and recognizable coins in the world. The coins are made of 22-karat gold that, by law, must originate from gold mined in the United States. They also contain durable silver and copper to help resist with scratching and marring.
Since gold is a very soft metal, it is extremely rare to find it not mixed with other stabilizing metals. For example, the Gold American Eagle coins contain 91.67% gold (22 karat), 3% silver, and 5.33% copper.