In 1986, American Eagle Gold Coins were introduced to the public. Augustus Saint-Gaudens famous design, Liberty, was selected as the design of the obverse of the American Eagle Gold Coins. Just like their gold cousins, American Eagle Silver Coins have been produced in both proof and bullion versions since 1986. American Eagle Bullion Coins provide collectors with a convenient way to add physical gold or silver to their coin collections. Since their introduction in 1986, gold and silver American Eagles have become leading bullion coin choices. The United States Mint produces proof versions of American Eagle Bullion coins for collectors. The proofs undergo a unique minting process. The coin is struck multiple times so the frosted, detailed images appear to float above a mirror-like field. After careful scrutiny by inspectors, each American Eagle Gold and Silver Proof Coin is sealed in a hard plastic capsule and mounted in a satin-lined velvet case with an official Certificate of Authenticity.