The gold in deep storage is held as an asset of the United States at a book value of $42.22 per troy ounce. The book value has been a constant $42 2/9, or $42.2222, per fine troy ounce since 1973, ...
Even if you hate the sound of excess change rattling around your pockets, you'll find a tour of the Denver branch of the United States Mint to be an interesting way to spend an hour or so.