Last updated: August 12, 2026 · By White Metal Resources Editorial
Quick answer: To spot a fake silver coin at home, weigh it on a 0.01-gram scale, measure diameter and thickness with calipers, check the edge against the mint specification, and slide a strong neodymium magnet down its face. Real silver is diamagnetic, so the magnet slows visibly instead of dropping or grabbing.
Counterfeit gold is harder to catch. Tungsten sits within 0.15% of gold's density, at 19.254 versus 19.283 grams per cubic centimeter, so weight and volume alone cannot separate a tungsten-cored bar from a genuine one. Serious buyers use an electronic precious metals verifier that reads electrical resistivity, and reputable dealers add ultrasound and X-ray fluorescence on bars they cannot break open.
The single most protective move is to buy from an established dealer with a written return policy, not from a private seller or a random marketplace listing.
Short on time? The essentials
- Real silver weighs 10.503 grams per cubic centimeter, real gold weighs 19.283, and the closest cheap substitute for gold is tungsten at 19.254 (source: Wikipedia element pages, checked June 2026).
- Silver counterfeits are structurally easier to catch than gold ones, because no common cheaper metal matches silver's density and its 429 W/m K thermal conductivity is the highest of any element.
- The five best free at-home tests are weight, diameter, thickness, edge pattern, and a slide-test with a strong neodymium magnet on a tilted coin.
- A magnet grabs iron, nickel, and steel but slides slowly on real silver, gold, or copper. All three of those metals are diamagnetic.
- The American Silver Eagle weighs exactly 31.103 grams, is 40.6 mm across, is 2.98 mm thick, and carries a reeded edge (source: United States Mint product page).
- The Canadian Silver Maple Leaf carries radial lines and a micro-engraved laser mark added in 2014 that a phone camera can photograph and confirm.
- A dealer-grade electronic verifier such as the Sigma Metalytics Precious Metals Verifier reads through slabs and capsules and catches most tungsten-cored gold.
- The federal Hobby Protection Act, first passed in November 1973 and updated in 2014, requires imitation numismatic items to be marked COPY.
- A pitch pushing "special edition" or "government issue" coins at a large premium over spot is the most common upsell pattern, not counterfeiting per se, and it drains value the same way.
- The safest buy path is a dealer with a published street address, a written return policy, a public BBB profile, and a fee schedule you can read before you commit.
This page is for savers and collectors who want a plain, testable way to check that a silver or gold coin is real before money changes hands. Below we cover which fakes are easier to catch, the free tests that work at your kitchen table, the tools serious buyers own, and the buy habits that keep counterfeits out of the account in the first place. Every physical constant traces to a public element or mint source, cited inline.
What counts as a counterfeit silver or gold coin?
A counterfeit is a coin or bar sold as one thing that is actually something else. Common types include silver-plated base metal, a tungsten core inside a thin gold shell, a wrong-alloy copy of a Silver Eagle, or a modern piece pretending to be a scarce dated original. The intent is to pass the piece at genuine value.
A related category is a legal imitation. Under the federal Hobby Protection Act, first passed in November 1973, imitation numismatic items must carry the word COPY struck or engraved on the piece (source: FTC Hobby Protection Rule). Congress updated the law in 2014 to reach anyone who supplies unmarked imitations, not just the maker.
The pattern that hurts most buyers is neither of those. It is the high-premium "special edition" or "graded rare" upsell where the coin is genuine but priced far above its silver or gold value. That is a separate warning covered in the numismatic coin upsell.
Which fakes are easier to spot: silver or gold?
Silver fakes are easier to spot because no common cheaper metal matches silver's density and its thermal conductivity is the highest of any element. Gold fakes are harder because tungsten sits inside 0.15% of gold's density, so weight and volume alone cannot separate a tungsten-cored bar from real one.
The numbers behind that difference are shown below. Copper is the closest common lower-density substitute for silver, and lead is the closest higher-density one, and neither is within a workable margin.
The gap of 0.029 grams per cubic centimeter between gold and tungsten works out to about 0.15% of gold's density. That is inside the manufacturing tolerance most home scales and calipers can resolve on a small coin, so a tungsten-cored fake of a 1-ounce gold coin can pass a naive weight-and-size check.
Silver has no similar problem. Copper reads 8.935 grams per cubic centimeter and lead reads 11.348, both well outside silver's 10.503, so a wrong-metal Silver Eagle usually fails weight or diameter or thickness on the first pass (source: Wikipedia, Silver).
| Metal | Density (g per cc) | Thermal conductivity (W per m K) | Magnetic behavior | Where you meet it |
|---|---|---|---|---|
| Silver | 10.503 | 429 | Diamagnetic | American Silver Eagle, Canadian Silver Maple Leaf, silver bars |
| Gold | 19.283 | 318 | Diamagnetic | American Gold Eagle (alloyed), Canadian Gold Maple Leaf, gold bars |
| Tungsten | 19.254 | 173 | Paramagnetic | The core of the most common counterfeit gold bar |
| Copper | 8.935 | 401 | Diamagnetic | Silver-plated base-metal fakes; alloy in Gold Eagle |
| Lead | 11.348 | 35.3 | Diamagnetic | Low-effort silver fakes; ice-melt test fails badly |
Sources: Wikipedia element pages for Silver, Gold, Tungsten, Copper, and Lead. Checked June 2026.
Thermal conductivity gives silver a second advantage. Silver conducts heat faster than any other element on the table, at 429 W/m K, and lead conducts it at only 35.3, more than 12 times slower.
Because heat travels through silver so fast, a small ice cube placed on a real silver bar melts noticeably faster than one on a lead or tungsten fake of the same shape. The gold-versus-tungsten gap is smaller but still visible, at 318 versus 173 W/m K.
Which physical tests can you do at home?
Five tests cover most counterfeits at home. They cost almost nothing beyond a small digital scale, a set of calipers, and one strong neodymium magnet. Run all five together; no single test is conclusive on its own.
- Weigh the coin on a 0.01-gram scale. Compare the reading to the published mint weight. A silver American Eagle should read 31.103 grams, and a 1-ounce Gold Eagle should read 33.931 grams gross weight (source: United States Mint).
- Measure diameter and thickness with digital calipers. A Silver Eagle is 40.6 mm across and 2.98 mm thick. A Silver Maple Leaf is 37.97 mm across and 3.29 mm thick (source: Royal Canadian Mint).
- Check the edge and rim pattern. A genuine Silver or Gold Eagle carries a reeded edge, and a Silver Maple Leaf carries a serrated edge with sharp rim lettering. A wrong or missing edge pattern is a common giveaway on cast copies.
- Run a slide test with a strong magnet. Place the coin flat on a slight incline and let a neodymium magnet slide down its face. Silver, gold, and copper are diamagnetic, so the magnet slows visibly. Steel, iron, or nickel core fakes grab or stick.
- Try the ice-melt test on a bar. Set an ice cube on a large silver or gold bar and a second cube on a known non-precious control at the same temperature. Silver melts ice fastest, gold second, tungsten and lead very slowly.
None of these five is a stand-alone verdict. A modern counterfeiter can match one or two on a small coin. The point of running all five is that a fake has to defeat every physical property at once, and few do.
What tools do serious buyers and dealers use?
For coins that clear the free tests and still feel wrong, or for anything above a few thousand dollars, an electronic verifier removes most of the doubt. Three tool categories cover almost every scenario.
Handheld electronic precious metals verifier
A precious metals verifier reads the electrical resistivity of a coin or bar through slabs, capsules, and thin sleeves. Sigma Metalytics, LLC in Round Rock, Texas markets the model most private buyers own, the Sigma Metalytics Precious Metals Verifier (source: Sigma Metalytics). It catches the majority of tungsten-cored gold and plated silver fakes in about a second per piece.
X-ray fluorescence gun
An XRF analyzer bathes the surface in X-rays and reads the emitted fluorescence to identify the elements present. A dealer buying scrap or bars typically owns one, and a Rank Math firearm-grade unit reads down to fractions of a percent. XRF only reads the surface, so it is paired with ultrasound on thick bars.
Ultrasound thickness gauge
An ultrasound gauge fires a sound pulse through the metal and reads the echo. The speed of sound differs across gold, tungsten, and silver, so a pulse that echoes at the wrong time on a thick bar exposes a mixed-metal core. Dealers use this on kilo bars and larger.
Modern mint security marks
Modern sovereign coins carry security marks readable with a phone. The Canadian Silver Maple Leaf from 2014 forward carries radial lines and a micro-engraved laser mark visible under magnification (source: Royal Canadian Mint). Sunshine Minting adds a Mint Mark SI feature to its rounds and bars, readable with a special lens (source: Sunshine Minting).
Genuine Silver Eagles and Maple Leafs, feature by feature
The two coins most often faked in North America are the American Silver Eagle and the Canadian Silver Maple Leaf. Their published specifications leave a tight range for counterfeiters to hit. Memorize the numbers.
| Coin | Metal and purity | Gross weight | Diameter | Thickness | Edge |
|---|---|---|---|---|---|
| American Silver Eagle | 0.999 fine silver | 31.103 g | 40.6 mm | 2.98 mm | Reeded |
| Canadian Silver Maple Leaf | 0.9999 fine silver | 31.103 g | 37.97 mm | 3.29 mm | Serrated |
| American Gold Eagle, 1 oz | 0.9167 fine gold (alloyed with silver and copper) | 33.931 g | 32.70 mm | 2.87 mm | Reeded |
| Canadian Gold Maple Leaf, 1 oz | 0.9999 fine gold | 31.150 g | 30.00 mm | 2.87 mm | Serrated |
Sources: United States Mint product pages for the Silver and Gold Eagle; Royal Canadian Mint product pages for the Maple Leaf. Checked June 2026.
Two small features on the Silver Eagle are worth calling out. The reverse design changed to the Type 2 eagle in 2021, sculpted by United States Mint artist Emily Damstra. A Silver Eagle dated 2021 or later that still shows the old heraldic eagle reverse is either a mislabeled listing or a counterfeit.
On the American Gold Eagle, the coin is not pure gold. The 1-ounce Gold Eagle carries one troy ounce of gold in a 33.931-gram alloy of 91.67% gold, 3% silver, and 5.33% copper. That alloy is why a Gold Eagle is a soft yellow, not a deep pure-gold yellow like a Maple Leaf.
Picture a private buyer offered a 1-ounce silver coin at a small local show for $32 in cash. The coin looks right at arm's length. The buyer runs three home tests before paying.
- Scale: the coin reads 30.4 grams. A real American Silver Eagle reads 31.103 grams. The gap of 0.7 grams is 2.3% under weight.
- Calipers: the diameter measures 40.1 mm against a spec of 40.6 mm, and thickness measures 2.85 mm against a spec of 2.98 mm. Both are under.
- Magnet slide: the neodymium magnet visibly grabs the coin instead of sliding. Real silver is diamagnetic; steel or nickel-cored fakes are attracted.
Any one of those results is a warning. All three together are a fake. The buyer walks away, out nothing but time. This is an illustration and not a specific dealer accusation.
How to buy so you avoid counterfeits in the first place
The most reliable counterfeit defense is where and how you buy, not how you test. A dealer with a public address, a written return policy, and a real BBB profile is unlikely to sell you a fake, because it would end the business.
The riskiest channels are the ones with no seller accountability. Private sales at coin shows without a receipt, listings on general marketplaces without a return path, and social-media sellers who ship from overseas concentrate almost all of the counterfeit loss reported to consumer agencies.
Before you commit, verify these. The dealer needs a physical street address and a BBB profile with real customer reviews. You need a written return policy of at least a few days, and an itemized invoice that lists coin, weight, and premium. Pay by card or check for buyer protection.
An IRA account adds one more layer. IRA silver and gold is bought by your custodian and delivered directly to an IRS-approved depository, so you never handle the metal or the payment. Read how to open a silver IRA for the full account flow, and precious metals IRA scams to avoid for red flags in that channel.
Federal enforcement history is worth reading too. In 2020 the Commodity Futures Trading Commission required JPMorgan Chase and subsidiaries to pay $920.2 million total over spoofing in metals and Treasury futures over roughly eight years (source: CFTC release 8260-20). That case involved market conduct, not physical counterfeits, but it shows regulators watch this sector actively.
The Anti-Counterfeiting Educational Foundation, launched January 2017, coordinates a task force with law enforcement on numismatic counterfeit cases. The foundation reports the task force has assisted in more than 70 cases against counterfeiters and unlawful importers (source: ACEF).
When home tests are not enough
Home tests catch most low-effort fakes. They do not catch every fake, and pretending they do is what gets buyers hurt. Four situations call for a dealer verification instead.
- Large bars of gold or silver. A 1-kilogram or larger bar has enough interior space for a tungsten or lead core that passes surface tests. Ultrasound or a resistivity verifier is required for confidence at that size.
- Any slabbed or graded coin above a small premium. Sealed holders block magnet and edge tests, and third-party grading fraud does exist. Buy from dealers who accept returns after independent verification.
- Coins offered at a suspiciously low price by an unknown seller. A silver coin at 20% below spot or a gold coin at 5% below spot from a stranger is almost never a bargain. Assume something is wrong and walk away.
- Coins offered at a suspiciously high price by any seller. A "rare government issue" pitch that runs 30% or more over spot is the more common way retirement savers lose money. The coin is often genuine, but the price is engineered to bury a large dealer markup.
If one of those describes what is in front of you, slow down. There is no CTA in this section on purpose. The right move is often to walk away, sleep on it, and buy from a documented dealer with a real return policy next week instead.
Counterfeit coin questions, answered
How can I spot fake silver at home?
Weigh the coin on a 0.01-gram scale, measure diameter and thickness with digital calipers, check the edge pattern against the mint specification, and slide a strong neodymium magnet down the face. Real silver is diamagnetic, so the magnet slows visibly. Any test that reads clearly off spec is a warning; two or more together is a fake.
Do fake silver coins stick to a magnet?
Real silver is diamagnetic, so a neodymium magnet slides slowly down a tilted silver coin and does not stick. Steel, iron, or nickel-cored fakes grab the magnet instead. Copper and lead fakes will not stick either, so the magnet test alone is not conclusive; run weight, diameter, and thickness alongside it.
Why is fake gold harder to spot than fake silver?
Tungsten weighs 19.254 grams per cubic centimeter and gold weighs 19.283, a gap of only 0.15%. That is inside the tolerance most home scales can resolve on a small coin. Silver has no similar substitute, since copper reads 8.935 and lead reads 11.348, both well outside silver's 10.503.
What is the best tool for verifying a coin?
For a private buyer, a Sigma Metalytics Precious Metals Verifier reads through slabs and capsules and catches most tungsten-cored gold and plated silver in seconds. Dealers also use X-ray fluorescence for surface composition and ultrasound for thick-bar interiors. All three cost more than typical home tests but reduce the fake risk close to zero.
Does the IRS check that IRA silver and gold is real?
The IRS does not physically inspect IRA metals, but IRA silver and gold must meet fineness minimums under 26 U.S.C. Section 408(m), with silver at .999, gold at .995, and platinum and palladium at .9995 (source: 26 U.S.C. Section 408). Your custodian sources the metal from approved dealers and stores it at an IRS-approved depository, which cuts your counterfeit risk sharply.
Is a coin marked COPY illegal to own?
No. Under the federal Hobby Protection Act, imitation numismatic items may be sold if they carry the word COPY struck or engraved on the piece (source: FTC Hobby Protection Rule). What is illegal is removing the mark or selling an unmarked imitation as genuine. A COPY-marked coin is a legal replica, not a counterfeit.
Where do most fake silver and gold coins come from?
Publicly reported enforcement cases point to bulk imports of unmarked replicas from overseas manufacturers, resold through online marketplaces and private sellers. The Anti-Counterfeiting Educational Foundation task force reports helping law enforcement in more than 70 cases against counterfeiters and unlawful importers since 2017 (source: ACEF).
Is a low price the biggest counterfeit warning?
A low price from an unknown seller is a warning, but it is not the biggest loss driver. Genuine coins sold at a large markup as "rare" or "special edition" cost retirement savers more each year than outright counterfeits, based on federal enforcement filings. See the numismatic coin upsell for that pattern.
Sources
- Wikipedia, Silver, element data page. Checked June 2026.
- Wikipedia, Gold, element data page. Checked June 2026.
- Wikipedia, Tungsten, element data page. Checked June 2026.
- Wikipedia, Copper, element data page. Checked June 2026.
- Wikipedia, Lead, element data page. Checked June 2026.
- United States Mint, American Eagle Silver Bullion Coins product page. Checked June 2026.
- Royal Canadian Mint, Silver Maple Leaf catalog. Checked June 2026.
- Federal Trade Commission, Hobby Protection Rule. Checked June 2026.
- Anti-Counterfeiting Educational Foundation. Checked June 2026.
- U.S. Commodity Futures Trading Commission, Release 8260-20 (JPMorgan order). Checked June 2026.
- Cornell Legal Information Institute, 26 U.S.C. Section 408. Checked June 2026.
- Sigma Metalytics, LLC, Precious Metals Verifier. Checked June 2026.
- Sunshine Minting, Mint Mark SI. Checked June 2026.
