How to Spot Fake Gold and Silver: Tests Every Stacker Should Know
By GSS CoFounder · June 16, 2026 · 9-minute read
The quick answer
Most fakes fail a simple magnet test and a weight check. If you are buying from a reputable online dealer, counterfeits are rare. If you are buying in person or on a secondary market, these tests are non-negotiable.
today's cheapest listingWhy fakes exist and who targets you
Counterfeit bullion is a real problem, but not a random one. Fakes show up most often in secondary markets: eBay, Facebook Marketplace, Craigslist and sometimes at coin shows from tables you do not recognize. The same places where the deal looks too good to be true usually are.
Online dealers like APMEX, JM Bullion and SD Bullion source directly from mints and authorized distributors. A fake getting through their supply chain would be a major operational failure, not a routine risk. That does not mean it is impossible, but buying from an established dealer with a return policy is your first and best protection.
Where you need to be careful is any private sale or resale situation, including coins passed down in a family collection. Not because people are necessarily dishonest, but because someone in that chain may have been fooled before you.
The magnet test
This one costs nothing and catches a lot of fakes fast. Gold and silver are non-magnetic. A strong rare earth magnet (neodymium) should show zero attraction to a real coin or bar.
One catch: the magnet test is a pass/fail screen, not a guarantee. Tungsten, which is commonly used in high-end gold counterfeits, is also non-magnetic. So a coin that passes the magnet test is not automatically real. But anything that sticks to the magnet? Set it aside.
Hold the magnet near the coin rather than placing it flat on top. You are looking for pull, not just contact. Slide the magnet slowly across a tilted bar and watch for drag, which can indicate a ferromagnetic core even when the surface is plated correctly.
Weight and dimensions
Every genuine bullion coin has published weight and diameter specs. A 1 oz American Gold Eagle weighs 33.93 grams and measures 32.7mm in diameter. A 1 oz Silver Eagle weighs 31.103 grams and is 40.6mm across. These numbers do not change. You can verify both against the US Mint's official specifications.
A decent digital scale accurate to 0.01 grams runs about $15 on Amazon. Calipers are another $10-15. Together they are the most reliable entry-level toolkit you can own.
Weight and diameter catch the majority of low-quality counterfeits. Where they fall short is with tungsten-core fakes. Tungsten has a density of 19.25 g/cm³ versus gold's 19.30, close enough that a well-made tungsten-core coin can match both weight and diameter within normal measurement tolerance. For 1 oz coins that risk is lower than for larger bars, but it exists. This is why the ping test and, for bars especially, ultrasound testing matter as a follow-up.
I check weight and diameter on every private purchase I make. Takes about 90 seconds per coin and I have never felt silly doing it.
The ping test
Genuine silver has a distinctive ring when tapped with another coin or a pen. The tone is clear and bell-like, ringing for a second or two. Most base metals produce a dull thud.
Free smartphone apps can analyze the sound and compare it against known reference tones for specific coins. Sigma Metalytics makes a dedicated device that goes further, though at $400+ it is more of a dealer tool than a personal one.
The ping test is especially useful for Silver Eagles and silver rounds because the tone is easy to distinguish. Silver bars have less resonance by shape, so the test is harder to read. Still worth doing on coins if you are in a pinch without a scale.
The ping test also has real value against tungsten-core fakes specifically. Gold and tungsten have nearly identical density, but their sound velocities differ. A tungsten-core coin rings differently than a genuine one, which is why the ping is worth doing even after a coin passes weight and size checks.
The acid test
Acid test kits use nitric acid to confirm metal content. You scratch the coin lightly against a black testing stone, apply a drop of acid to the mark and watch the color reaction. Gold of different purities reacts differently. Silver reacts differently from gold-plated lead.
These kits are inexpensive and widely available. The tradeoff is that the test is mildly destructive. You are scratching the coin's surface. On a bullion coin you plan to hold long-term, that is a minor concern. On anything with numismatic value, skip it.
For silver, a separate silver acid test works on the same principle. One drop on a small scratch tells you within seconds whether you have real silver or a base metal with silver plating.
Silver-specific fakes to know about
Silver fakes are generally less sophisticated than gold fakes because silver is worth less per ounce, but they are far more common in everyday secondary market transactions.
Silver-plated copper rounds are the most frequent counterfeit a stacker will encounter. They look right, they feel roughly right and they pass a casual visual check. A scale catches most of them since copper is noticeably lighter than silver per unit volume. The ping test is your second line of defense: copper rounds produce a dull, flat tone versus silver's clear ring.
Lead-core silver bars do exist, though they are rarer. Lead has a density of 11.34 g/cm³ versus silver's 10.49, so a lead-core bar can be made to match a silver bar's weight by adjusting the dimensions slightly. Weight plus calipers together catch these. Ultrasound testing is definitive for bars if you have any doubt after the basic checks.
The practical takeaway on silver: scale and ping test before buying. If either is off, walk.
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Why government coins are harder to fake
Sovereign coins from major government mints have tighter tolerances, more intricate designs and security features that are genuinely difficult to replicate at a profit. The reeded edge on a Silver Eagle, the micro-engraved laser marks on a Canadian Maple Leaf, the relief depth on a Gold Buffalo. All of that requires serious tooling investment to fake convincingly.
That is one reason I push sovereign coins over generic rounds and bars in the gold bars vs coins and silver coins vs silver bars guides. Generic rounds look simple. That cuts both ways: easier to produce legitimately but also easier to counterfeit without detection. A fake Silver Eagle draws more scrutiny than a fake generic round.
The Canadian Maple Leaf has gone furthest with Bullion DNA, a laser-engraved security mark on the coin's reverse, visible only under magnification and registered in a secure database. Authorized dealers with the Bullion DNA reader can match the mark like a fingerprint. Gold Maples dated 2014 and later and Silver Maples dated 2015 and later carry the mark. If you are buying Maples on the secondary market, any registered dealer can run the check.
What to do if you suspect a fake
Stop the transaction. If you are at a coin show or meeting someone in person, you do not owe them an explanation. Say you need to do more research and walk away.
If you already have something and now have doubts, take it to your local coin shop. A dealer with a Sigma Metalytics or XRF gun can tell you definitively in about 30 seconds. I learned this the hard way. A former employer gifted me an 1874 Trade Dollar, a beautiful coin, and I brought it into my LCS expecting to sell it. The dealer told me it was a fake. That same employer had purchased an entire sheet of them during the 2008 financial crisis. I hope the rest of his coins were genuine. Trade Dollars are one of the most counterfeited US coin series, and that is exactly the kind of thing you only find out at a coin shop. Most shops will run a check for free or a small fee, especially if you are a regular.
Do not try to resell something you suspect is counterfeit. Pass it along only after a shop has verified it as genuine.
If you bought from a legitimate online dealer and something seems off, contact them before doing any destructive testing. Reputable dealers will make it right.
Who needs which tests
You buy only from online dealers. The magnet and weight check are good habits but not your primary protection. A dealer with authentication processes and a return policy handles most of the risk for you.
You buy at coin shows, at your LCS or from private sellers. Scale and calipers belong in your bag. Run every coin before money changes hands, and add the ping test on silver as a quick second screen.
You are a new stacker buying your first coins. Start with a reputable online dealer and stick to government-minted sovereign coins. As you move into secondary market buying, add the tools and get comfortable running the checks before they matter.
today's cheapest listing- Can you spot a fake gold coin just by looking at it?
- Sometimes, but not reliably. High-quality counterfeits can look nearly identical to genuine coins. Visual inspection is a starting point, not a conclusion. Always follow up with weight, dimensions and, when in doubt, a magnet or ping test.
- Do weight and calipers catch tungsten-core gold fakes?
- Not always. Tungsten has nearly the same density as gold (19.25 vs 19.30 g/cm³), so a well-made tungsten-core coin can pass both a scale and a caliper check. The ping test is more reliable against tungsten fakes because gold and tungsten have different sound velocities. For bars, ultrasound testing is the most definitive non-destructive method.
- Is it safe to buy gold and silver on eBay?
- Possible, but you are accepting more risk than buying from a dedicated bullion dealer. eBay has a buyer protection policy and many sellers are legitimate, but verification becomes your full responsibility. Stick to sellers with long track records and verify everything on arrival. Our how to buy silver guide covers where we recommend buying.
- What is the best at-home test for silver?
- Weight and the ping test together. A 1 oz Silver Eagle should weigh exactly 31.103 grams and produce a clear ring when tapped. If either is off, get a second opinion before buying or accepting delivery.
- Do fake coins show up in APMEX or JM Bullion orders?
- Rarely. Both dealers have authentication processes and return policies if it ever happens. Buying from an established dealer with a verifiable track record is your most reliable protection against counterfeits to begin with.
The bottom line
A $15 scale, a $10 set of calipers and a $5 rare earth magnet cover most counterfeits you will encounter buying from private sellers or at shows. They do not catch every tungsten-core fake, which is why the ping test is worth adding to the routine, especially on silver. Buy from reputable online dealers, stick to sovereign government coins and your risk is low from the start. Add the tools when you move into secondary market buying.
For more on which coins to prioritize, see the gold bars vs coins guide and the silver coins vs silver bars guide. For current pricing across dealers, see the how to buy gold and how to buy silver guides.