The United States Mint produces proof versions of American Eagle Bullion coins for collectors. American Eagle Proof Coins undergo a specialized minting process, which begins by manually feeding burnished coin blanks into presses fitted with special dies. The coin is struck multiple times so the softly frosted, yet detailed images seem to float above a mirror-like field. After scrutiny by white gloved inspectors, each American Eagle Gold and Silver Proof Coin is sealed in a protective plastic capsule and mounted in a handsome satin-lined velvet presentation case with its own official Certificate of Authenticity. Since American Eagle Proof Coins are produced by the United States Mint, each coin's content, weight and purity are guaranteed by the United States Government.