Why Does A 1 oz American Gold Eagle Coin Weigh More Than One Troy Ounce?

American Gold Eagles are produced with 91.67% gold content with an additional 8.33% alloy of silver and copper for greater durability. As such, the American Gold Eagle contains 1 Troy ounce (31.1 grams) of gold content with an additional 2.8 Grams of silver and copper. As a result, the total weight of the 1 oz American Gold Eagle is roughly 33.9 Grams.

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