The United States Mint issues Gold American Eagles as legal tender gold bullion coins for investment purposes, under congressional authority. The family of Gold Eagles consists of four sizes and face values. Though they are technically money, their face value is insignificant compared to their intrinsic value, and they do not circulate as coinage. By far, one of the most popular and most liquid sizes of almost all coins is the one-ounce $50 face value American Gold Eagle.