Why Your New U.S. Mint $5 Gold Commemorative May Fail a Dealer’s Tester (And Why It Is Still Real Gold)

If you own a 2024 Greatest Generation, 2025 U.S. Marine Corps 250th Anniversary, or 2026 FIFA World Cup $5 gold commemorative, there is something you should know before you take it to a coin shop for appraisal, testing, or sale.

These coins can fail the electronic testers most dealers use at the counter. The coin is still real gold. The tester is simply not calibrated for the new alloy the United States Mint began using in 2024.

At PV Bullion & Gold Exchange in Ponte Vedra Beach, we have already run into this situation and know how to handle it correctly. Here is what changed, why it matters, and what you should do if a dealer tells you your modern commemorative gold coin “did not test as gold.”

What Actually Changed at the U.S. Mint in 2024

For decades, the United States Mint struck its $5 gold commemorative coins in a traditional alloy of 90% gold and 10% copper. That formula traces back to classic U.S. gold coinage and had been used consistently across the modern commemorative program from the 1986 Statue of Liberty coin through the 2023 Harriet Tubman issue.

Starting with the 2024 program, the U.S. Mint retired that historic blend. Every $5 gold commemorative issued from 2024 onward is now struck in a new alloy: 90% gold, 6% silver, and 4% copper.

The gold content is the same. The overall fineness is the same. What changed is the composition of the remaining 10%, which is now a mix of silver and copper instead of copper alone.

Which Coins Are Affected

If you are holding any of these, you have a coin struck in the new 90/6/4 alloy:

2024-W $5 Greatest Generation Gold Commemorative. The first coin ever struck in the new alloy, minted at West Point to honor World War II veterans.
2025 U.S. Marine Corps 250th Anniversary $5 Gold Commemorative. Issued to mark the 250th birthday of the United States Marine Corps.
2026 FIFA World Cup $5 Gold Commemorative. Both proof and uncirculated versions use the 90/6/4 formula.

Any $5 gold commemorative dated 2023 or earlier is still the traditional 90% gold and 10% copper blend and will test normally on standard equipment.

Why the Dealer’s Tester Says “Not Gold”

Most coin shops and precious metals dealers use conductivity-based electronic testers at the counter. These devices read the electrical signature of the metal and compare it to a preset library of known alloys. If the reading matches a stored profile, the coin passes. If it does not, the coin fails.

The problem is straightforward. The 90% gold, 6% silver, 4% copper alloy is new. It does not match the 90/10 gold-copper profile stored on most testers. When a 2024, 2025, or 2026 $5 gold commemorative is placed on a tester still running the old library, the reading falls outside the tolerance window for known gold alloys and the device flags the coin as suspect.

The coin is real. The tester is right about the reading. The dealer’s software just does not yet know that this is a legitimate United States Mint alloy.

Why This Matters to You as an Owner

If you bought one of these coins directly from the U.S. Mint, this is not a problem in your living room. The problem only appears when the coin is presented to a dealer who has not adjusted for the new alloy. In that setting, three things can go wrong:

The dealer refuses to buy the coin because their tester failed it.
The dealer offers scrap or melt value for what they believe is a questionable piece, well below the coin’s actual value.
The dealer suggests the coin is counterfeit, which is upsetting and untrue.

This is not a hypothetical. It is already happening, and it will happen more often as these coins enter the secondary market through estate sales, gifts, and private resales in the years ahead.

How PV Bullion & Gold Exchange Handles These Coins

We keep current on U.S. Mint composition changes because it is our job to. When a modern $5 gold commemorative comes across our counter, we verify it using methods appropriate to the alloy, including specific gravity, weight and dimension checks against published U.S. Mint specifications, and where appropriate, XRF analysis that can read the actual elemental composition rather than relying on a stored alloy profile.

The result is that a 2024, 2025, or 2026 $5 gold commemorative gets evaluated on what it actually is, a genuine United States Mint gold coin, not on whether it matches a library entry written before the alloy existed.

What to Do If Your Coin Has Already Been Rejected Elsewhere

If a dealer has already told you that your modern $5 gold commemorative failed testing, do not accept a low offer, do not agree that the coin is fake, and do not sell it under duress. Take the coin home and get a second opinion from a dealer who is aware of the 2024 alloy change.

Bring the following if you have them:

The original U.S. Mint packaging, box, and certificate of authenticity
Any receipts or order confirmations from the U.S. Mint
The coin itself, ideally still in its capsule

None of these are required for us to verify the coin, but they help document provenance and make the transaction cleaner.

Visit PV Bullion & Gold Exchange

We are located at 2 Fairfield Blvd Ste 5, Ponte Vedra Beach, FL 32082, and open Monday, Wednesday, and Friday from 12 Noon to 5 PM. Our $2,000 minimum transaction applies to all purchases and sales. Accepted payment methods for our purchases include cash, check, and U.S. bank wire.

✅ Get Directions to PV Bullion & Gold Exchange

Frequently Asked Questions

Is a 2024, 2025, or 2026 $5 gold commemorative still real gold?

Yes. These coins contain 90% gold by weight, the same gold content as the traditional $5 gold commemorative program. Only the remaining 10% changed, from pure copper to a blend of silver and copper.

Why did the U.S. Mint change the alloy?

The U.S. Mint has adopted the 90% gold, 6% silver, 4% copper formula as the standard for its modern $5 gold commemorative program going forward. The change applies to every $5 gold commemorative authorized and issued from 2024 onward.

Will a dealer’s tester ever be updated to read the new alloy?

Tester manufacturers can add new alloy profiles to their libraries, and some may do so over time. Until then, a coin can still be verified by other established methods including weight, dimension, specific gravity, and XRF analysis.

Does this affect American Gold Eagles or Gold Buffalos?

No. The alloy change applies specifically to the $5 gold commemorative program. American Gold Eagles remain 22 karat (91.67% gold, with silver and copper). American Gold Buffalos remain .9999 fine (24 karat). Neither is affected.

Does this affect pre-2024 $5 gold commemoratives I already own?

No. Every $5 gold commemorative dated 2023 or earlier was struck in the traditional 90% gold and 10% copper alloy and will read normally on standard testing equipment.

Why Your New U.S. Mint $5 Gold Commemorative May Fail a Dealer’s Tester (And Why It Is Still Real Gold)