A magnet does not stick to real silver. Pure silver is diamagnetic, meaning it produces a tiny repulsive force against a magnetic field rather than being attracted to it. That repulsive force is far too weak to feel with your fingers, so in practical terms, bringing a refrigerator magnet or even a strong rare-earth magnet up to a genuine silver coin or bar will produce no noticeable pull at all. But the relationship between silver and magnets is more interesting than a simple pass-or-fail sticking test, and understanding it can actually help you spot fakes.
Why Silver Repels Rather Than Attracts
Materials respond to magnetic fields in different ways depending on their electron structure. Ferromagnetic materials like iron, nickel, and cobalt are strongly attracted to magnets because their atoms can align their tiny magnetic moments in the same direction, creating a bulk magnetic effect. Silver does the opposite. Its electrons are arranged so that when an external magnetic field is applied, the atoms generate a very slight opposing field. This is diamagnetism, and it is an extremely weak effect. You would need sensitive laboratory instruments to measure it. In everyday life, a silver ring sitting next to a magnet behaves as if the magnet is not there.
The magnetic susceptibility of silver, which is a measure of how strongly it responds to a magnetic field, has been studied across a wide range of temperatures. Researchers have measured this property from roughly room temperature up to about 700 °C and found that it remains consistently negative, confirming that silver stays diamagnetic well beyond any temperature you would encounter in daily use.1Canadian Journal of Physics. A MAGNETIC SUSCEPTIBILITY BALANCE AND THE TEMPERATURE DEPENDENCE OF THE MAGNETIC SUSCEPTIBILITY OF COPPER, SILVER, AND GOLD, 295°–975 °K Copper and gold behave similarly. None of the common precious metals are ferromagnetic.
The Magnet Stick Test for Spotting Fakes
Because silver is non-magnetic, bringing a magnet to a piece of jewelry or a bullion bar and checking whether it clings is a quick first-pass authenticity test. If the magnet sticks firmly, the item almost certainly contains a ferromagnetic core, usually iron or steel, underneath a silver-colored coating. Silver-plated steel flatware, for instance, will grab a magnet right away. So will cheap costume jewelry that has been electroplated to look like silver.
The test is useful but not foolproof. The magnet tells you when something is definitely not solid silver, but passing the test does not guarantee the item is genuine. Plenty of non-magnetic metals look like silver. Lead, tin, zinc, and aluminum are all non-magnetic, and some counterfeit coins or bars are made from these cheaper metals, sometimes coated with a thin layer of real silver. A counterfeit silver bar made mostly of lead will fail to attract a magnet just like real silver would, so you cannot rely on this test alone.
The Slide Test and Why It Is More Revealing
There is a second, more informative magnet test that takes advantage of a different physical phenomenon. If you tilt a silver bar at about a 45-degree angle and let a strong neodymium magnet slide down its surface, the magnet will glide noticeably slowly, almost as if moving through honey. This happens because of eddy currents. When a magnet moves across a highly conductive metal, the changing magnetic field induces swirling electrical currents in the metal, and those currents generate their own magnetic field that opposes the motion of the magnet. The result is a braking effect that visibly slows the magnet’s descent.
Silver is the most electrically conductive of all metals, which makes this braking effect particularly strong. Research on eddy current losses in different materials has confirmed that silver produces the highest eddy currents among common metals, meaning the opposing force acting on a moving magnet is stronger with silver than with alternatives like aluminum or copper.2Highlights in Science Engineering and Technology. Losses of Eddy current and material efficiency optimization In practice, if you slide a neodymium magnet down a genuine silver bar, it creeps down with an almost eerie sluggishness. On a fake bar made from a less conductive metal, the magnet slides faster. On a ferromagnetic fake, it just sticks.
The slide test is harder to fake than the simple stick test. A counterfeiter would need to match silver’s conductivity to replicate the effect, and no cheap substitute metal does. Copper comes closest, but even copper is about 5-6% less conductive than silver, and the difference is perceptible with a strong enough magnet. This is why many bullion collectors and coin dealers keep a neodymium magnet handy as a screening tool.
Sterling Silver and Other Silver Alloys
Most silver jewelry, flatware, and decorative objects are not pure silver. They are sterling silver, which is 92.5% silver and 7.5% other metals, typically copper. Since copper is also diamagnetic, sterling silver behaves essentially the same way in a magnet test: no attraction, and a strong eddy current braking effect if you try the slide test. The slight reduction in conductivity from the copper content might make the magnet slide fractionally faster than on pure silver, but the difference is subtle enough that it does not undermine the test for practical purposes.
Some silver alloys use different metals for that remaining 7.5%. Argentium silver, for example, replaces some of the copper with germanium to improve tarnish resistance. Germanium is also non-magnetic, so Argentium passes the magnet test just fine. The alloy to watch out for is any that incorporates nickel, which is ferromagnetic. Some older or lower-quality “silver” alloys, particularly those used in parts of Asia and marketed under various local purity standards, may contain enough nickel to produce a weak magnetic response. If your silver piece shows any noticeable attraction to a magnet, even a slight tug, that is worth investigating further.
Metals That Fool People
A common frustration with the magnet test is that it can give a false sense of security. Several metals and alloys look remarkably like silver but are non-magnetic, so they pass the basic stick test while being worth a fraction of the price.
- Lead: Heavier than silver but similar in color when polished. Some counterfeit bars are made from lead and plated with silver. A weight-and-dimension check helps here, since lead is denser than silver, so a lead-core bar that matches silver’s dimensions will be heavier than expected.
- Zinc and tin alloys: Lighter than silver and non-magnetic. These show up in fake coins. They tend to feel lighter in the hand and produce a duller ring when tapped.
- Tungsten: This is the counterfeiter’s dream metal for gold fakes because its density is nearly identical to gold’s. For silver, tungsten is less commonly used because its density is much higher than silver’s, making it harder to match the expected weight without adjusting dimensions.
- Stainless steel (some grades): Certain austenitic stainless steels, like 316L, are essentially non-magnetic. A polished piece of 316L stainless can look like silver and pass a magnet test. The slide test is more helpful here, because stainless steel is far less conductive than silver, so the magnet will barely slow down.
The slide test catches most of these impostors. The stick test alone catches only the crudest fakes, those made from iron or low-grade magnetic steel.
How to Do the Magnet Test Properly
If you want to use a magnet to screen silver at home, the type of magnet matters. A standard refrigerator magnet is too weak to be informative. You need a neodymium magnet, ideally one rated at N42 or stronger, and large enough to produce a significant field. A disc-shaped neodymium magnet about the size of a coin works well for jewelry and small items. For bullion bars, a larger block magnet gives a more dramatic slide test.
For the stick test, simply bring the magnet to the surface of the item. Any obvious attraction, where the magnet wants to jump to the metal or clings when released, is a red flag. A very faint pull that you can barely feel is not necessarily alarming, because even diamagnetic metals can interact in barely perceptible ways with strong magnets, and the magnet could be responding to a clasp, a pin mechanism, or a small component inside the piece rather than the silver itself.
For the slide test, you need a flat, smooth surface of silver large enough for the magnet to travel at least a couple of inches. Place the silver at an angle and release the magnet on the surface. On genuine silver, a strong neodymium magnet should slide down dramatically slower than it would on a piece of glass or plastic. You can compare against a known piece of copper as a rough reference, since copper’s conductivity is close enough to silver’s that both produce a noticeably slow slide, though silver’s should be slightly more pronounced.
Other Ways to Verify Silver
Since the magnet test has blind spots, serious buyers and collectors combine it with other checks. No single test is definitive on its own, but stacking several together gives you high confidence.
- Hallmarks and stamps: Genuine silver is usually stamped with a purity mark. “925” indicates sterling silver. “.999” or “999” indicates fine silver. The absence of a hallmark does not prove a fake, especially on older pieces, but the presence of a crisp, well-formed hallmark from a recognized assay office is reassuring.
- The ice test: Silver conducts heat faster than almost any other metal. If you place an ice cube on a silver bar, it melts noticeably faster than on a piece of stainless steel or glass sitting at the same temperature. This is a fun party trick, but it is also somewhat useful for screening bullion.
- Specific gravity testing: This involves weighing the item in air and then in water to calculate its density. Pure silver has a density of about 10.49 grams per cubic centimeter, and sterling is close to that. If the measurement comes back significantly off, the item is suspect. This method catches lead fakes (density around 11.3) and zinc fakes (density around 7.1) that the magnet test would miss.
- XRF analysis: X-ray fluorescence analyzers can determine the elemental composition of a metal surface in seconds without damaging the item. These machines cost thousands of dollars, but many coin shops and precious metals dealers have one. If you are buying a high-value item, asking for an XRF reading is reasonable.
- Acid testing: A small scratch on an inconspicuous area is treated with a drop of nitric acid. Real silver turns a creamy white color, while base metals react differently. This test is destructive, so it is typically a last resort.
For everyday purchases like jewelry or small bullion pieces, the magnet test combined with a hallmark check and a quick weight assessment is usually enough. For high-value bars, coins, or antique pieces, specific gravity testing or an XRF scan provides much stronger assurance.
Silver-Plated Items and the Magnet Confusion
A significant source of confusion comes from silver-plated items. Silver plating involves depositing a thin layer of real silver onto a base metal, often brass, copper, or steel. If the base metal is steel, the item will attract a magnet despite having genuine silver on its surface. This does not mean “real silver is magnetic.” It means the item is mostly steel with a cosmetic silver coating. The magnet is responding to the steel core, not the silver layer.
Silver-plated items are sometimes marked “EPNS” (electroplated nickel silver), “silver plate,” or “A1.” They are not marked “925” or “.999.” If an item has a “925” stamp but attracts a magnet, either the stamp is fraudulent or there is a hidden steel component like a weighted base in a candlestick or a spring inside a clasp. Weighted sterling pieces, commonly found in older candlesticks and salt shakers, often have a steel rod or concrete fill inside to add stability. These will respond to a magnet even though the outer shell is genuine sterling.
Why Neodymium Magnets Respond to Silver at Close Range
You might notice that if you bring a very strong neodymium magnet extremely close to a thick piece of silver, there is a subtle interaction. The magnet does not stick, but if you move it quickly, you can feel a slight resistance, as if the silver is pushing back. This is the eddy current effect happening in real time, the same physics behind the slide test. The magnet’s movement induces currents in the silver, and those currents create a small opposing force. If you hold the magnet stationary against the silver, this effect vanishes, because eddy currents require a changing magnetic field to exist.
This can confuse people who are not expecting it. They bring a powerful magnet near their silver coin, wiggle it around, feel something, and conclude the silver must be magnetic. What they are actually feeling is confirmation that the metal is highly conductive, which is exactly what you would expect from genuine silver. The key distinction is between attraction (the magnet wants to move toward the metal and cling) and resistance to motion (the magnet resists being moved across the surface but does not cling when stationary). Attraction means the metal is ferromagnetic and almost certainly not silver. Resistance to motion means the metal is conductive and is consistent with silver.
Coins and the Magnetic Anomaly
Some government-issued silver coins produce unexpected results with the magnet test, and this catches collectors off guard. Pre-1965 U.S. dimes, quarters, and half dollars are 90% silver and 10% copper. They behave exactly as expected: non-magnetic, with a noticeable eddy current effect. Canadian silver dollars from certain years are the same.
Where it gets odd is with modern commemorative and bullion coins from various mints that use security features or special alloy compositions. Some bimetallic coins have a ring of one metal and a center of another, and if one component contains nickel, the coin may show a partial magnetic response. This does not mean the silver portion is magnetic. It means the coin has a non-silver component that is. The Canadian Silver Maple Leaf, for example, is 99.99% pure silver and shows zero magnetic attraction, with a strong and clean eddy current slide effect that dealers specifically look for.
If you are testing an older coin and get an unexpected magnetic response, check whether the coin is actually silver or whether it is from a year when the mint switched to a clad composition. U.S. quarters minted after 1964, for instance, are copper-nickel clad and contain no silver at all. These can show a slight magnetic response due to the nickel content, and people sometimes mistake them for silver coins that “fail” the magnet test. Knowing your coin’s composition before testing avoids this confusion.