Same mint, same gold content, same face value. The real differences are karat, durability, available sizes, and the premium on the day you buy.
The U.S. Mint produces two flagship gold bullion coins. The American Gold Eagle, launched in 1986, is a 22-karat coin. The American Gold Buffalo, launched in 2006, was the first 24-karat (.9999 fine) gold coin struck by the United States for investors. Both one-ounce coins contain exactly one troy ounce of gold and carry a $50 face value.
So if the gold is the same, why do buyers argue about them? Because the alloy changes how the coin wears, the programs come in different sizes, and premiums for the two do not always move together. This guide compares them using the U.S. Mint's published specifications.
| Spec | American Gold Eagle (1 oz) | American Gold Buffalo (1 oz) |
|---|---|---|
| First year | 1986 | 2006 |
| Composition | 91.67% gold (22k), 3% silver, balance copper | .9999 fine gold (24k) |
| Gold content | 1.0000 troy oz | 1.0000 troy oz |
| Total weight | 1.0909 troy oz (33.931 g) | 1.0001 troy oz (31.108 g) |
| Diameter | 32.70 mm | 32.70 mm |
| Face value | $50 | $50 |
| Bullion sizes | 1 oz, 1/2 oz, 1/4 oz, 1/10 oz | 1 oz |
| Obverse design basis | Augustus Saint-Gaudens' Double Eagle | James Earle Fraser's 1913 Buffalo nickel |
Sources: the U.S. Mint's American Eagle gold bullion and American Buffalo gold bullion pages. Note that the Mint does not sell bullion coins directly to the public; you buy them from dealers, at prices based on the gold market plus a premium.
The most common misconception is that the Buffalo "has more gold." It does not. The Gold Eagle simply contains extra silver and copper on top of its full troy ounce of gold, which is why it weighs about 2.8 grams more. When you sell, a dealer pays for the gold content, and both coins have the same one ounce.
Pure gold is soft. The Buffalo's .9999 gold scratches, dings and shows handling marks more easily than the alloyed Eagle. For a coin that will sit in a capsule in a safe, that barely matters. For coins that may be handled, counted, or passed around, the Eagle's harder alloy holds up better. The Eagle's alloy also gives it a slightly warmer tone compared with the Buffalo's brighter yellow.
Some buyers, particularly outside the U.S., have a preference for .9999 gold. Inside a U.S. IRA, both coins are U.S. Mint coins covered by the exception in 31 U.S.C. 5112, so the purity difference does not determine eligibility. Always confirm with your custodian.
The Gold Eagle bullion program comes in four sizes: 1 oz, 1/2 oz, 1/4 oz and 1/10 oz. That flexibility is one of its biggest advantages. Smaller coins let you buy in smaller increments and, later, sell a portion of your holdings without selling a full ounce.
The Buffalo bullion program is focused on the 1 oz coin. If you want fractional U.S. gold, the Eagle is the practical choice, though fractional coins cost more per ounce. Our analysis of fractional Gold Eagle premiums per fine ounce shows how to weigh that trade-off.
The Gold Eagle's obverse is based on Augustus Saint-Gaudens' Liberty design from the early-20th-century $20 Double Eagle, often called one of the most beautiful American coins. Its reverse was redesigned in 2021: the original family-of-eagles design was replaced by a portrait of an eagle, and the Mint added enhanced security features. Dealers often label these "Type 1" and "Type 2."
The Buffalo reuses James Earle Fraser's 1913 Buffalo nickel designs, with a Native American portrait on the obverse and an American bison on the reverse. Bullion strikes of both coins carry no mint mark.
Both coins are popular targets for counterfeiters precisely because they are so widely traded. A few minutes of checking on arrival is worth it, especially for coins bought from anyone other than an established dealer.
Keep coins in their capsules or tubes whenever possible. Handling increases the visible wear on the softer 24-karat Buffalo in particular.
In practice, the decision often comes down to price. Check the per-ounce premium for each at the same dealer, payment method and quantity. When one is noticeably cheaper, buy that one; both are highly liquid U.S. Mint products. If you are weighing coins against bars entirely, see our gold bars vs. gold coins comparison, and for a deeper look at the Eagle on its own, our Gold Eagle pre-purchase checklist.
Compare Eagle and Buffalo prices side by side at dealers we review.
Compare Bullion Dealers →Both coins hold one troy ounce of gold from the U.S. Mint. The Eagle wins on durability and size options; the Buffalo wins on purity and appeals to buyers who want 24-karat gold. Neither has "more gold," so let the premium and your plans for selling decide.
This guide is for general information only and is not financial, tax or legal advice. Product specifications, dealer policies and rules change; confirm current details with the dealer, the issuing mint or the relevant agency before you act.
Dealer premiums, shipping thresholds and inventory change. Compare the final delivered price and product availability before placing an order.
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