The American Gold Eagle is the official gold bullion coin of the United States of America. These coins have purity and weight that has been guaranteed by the United States Government. As gold rounds go, these tend to cost the most. They benefit from not only their gold value, but their collectible value as well. The interesting thing about these coins is they actually weigh slightly more than a troy ounce. This is because instead of being .999 gold they are .916 gold, the rest of the coin is comprised of silver and copper to make the coin more wear resistant. To ensure that the purchaser gets exactly 1 troy ounce of gold these coins weigh 1.0909 troy ounces. If you are unsure where to begin purchasing precious metals, or want the confidence of owning precious metals guaranteed by the USA, this is a great choice.