The American Gold Eagle contains 31.10 g of fine gold in its 1-ounce version, but at 22-carat fineness (916.7‰): the coin weighs 33.93 g total, alloyed with copper and silver for durability. Here are its specs, how to estimate its value and sell it.
Issued by the US Mint since 1986, the gold American Eagle is struck at 22 carats (916.7‰). The 1-ounce version does contain 31.10 g of fine gold, but weighs 33.93 g total: the remainder is a copper-and-silver alloy that makes it more scratch-resistant. Fractions exist (1/2, 1/4, 1/10 oz).
Unlike the Maple Leaf (24 carats, soft), the 22-carat American Eagle resists daily wear better. The amount of fine gold stays the same for a 1 oz (31.10 g): only the total weight differs due to the alloy.
Intrinsic value = 31.10 g of fine gold × the day's gold rate (for the 1 oz) — you reason on fine gold, not total weight. Compare buy-back rates and check the rate (see understanding the gold rate). See also investment gold coins.
For the 1-ounce version, the intrinsic value is 31.10 g of fine gold × the day's rate, plus a generally moderate premium. You calculate on fine gold (31.10 g), not the 33.93 g total weight.
Because it's struck at 22 carats (916.7‰): it contains 31.10 g of fine gold per ounce, plus a copper-and-silver alloy that makes it more durable, hence a higher total weight.
The Maple Leaf is purer (24 carats) but softer; the American Eagle (22 carats) is more scratch-resistant. Both contain the same amount of fine gold per ounce and are bought back close to spot.