Identify Real Sterling Silver
Sterling silver is the 92.5% pure silver alloy you buy for jewellery, and you tell if sterling silver is real at home with 7 tests that take about 20 minutes with a magnet, a hallmark lens, a magnet-free sound tap, a coin, a white felt cloth, an ice cube and a simple weigh-in. The 925 hallmark is the single strongest tell, because it is the stamp a certified refiner presses into the piece, and a genuine mark is deeper than a surface scratch. If a piece is unmarked, the remaining 6 home checks carry the weight, and each one below is a test you can run at a kitchen counter.
The tests in this guide run from the fastest and free to the slowest and most telling, so you can stop as soon as 2 or 3 agree. A fake will fail several of them at once, which is what separates a cheap plating from a real piece of sterling. The 7 tests are the magnet test, the hallmark check, the sound test, the weight test, the ice test, the cloth test and the coin scratch test, and they work on rings, chains, brooches and flatware alike.
What real sterling silver is
Sterling silver is an alloy of 92.5% silver and 7.5% other metal, usually copper, and that 925 figure is why the hallmark reads 925. The copper is added to make the alloy hard enough to hold a setting and a shape, and it is also why sterling tarnishes, because the copper reacts with the air. The purity of 92.5% is fixed by law in most markets, so a piece stamped 925 in the United States, the United Kingdom or the European Union is the same alloy. A piece of sterling can be 925, 999 fine silver or 800, and only the 925 stamp is the one to look for when you are checking a piece of jewellery. Fine silver at 999 is softer, and 800 is a lower grade, so 925 is the number that defines sterling and the number this page is built around.
The 7 home tests at a glance
The 7 home tests each probe a different property of real sterling silver, and together they cover magnetism, marking, sound, density, temperature response, friction and hardness. The table below is the fast version of the page, and the sections after it give you the steps for each one.
| Test | What a real piece does | What a fake does |
|---|---|---|
| Magnet test | Stays put, no pull | Snaps toward the magnet |
| Hallmark test | Deeper 925 stamp, often with an assayer mark | No mark, a shallow stamp or a worn-off number |
| Sound test | Clear, high ring | Flat, dull thud |
| Weight test | Dense, 10.5 grams for a 1 cm cube | Lighter for its size |
| Ice test | Ice melts faster on it | No faster melting |
| Cloth test | Grains black where it rubs | Stays clean |
| Coin scratch test | Smooth grey streak, no colour transfer | White streak or colour transfer |
A single test can be fooled, so run at least 3 and trust the pattern. The hallmark is the anchor test, and the magnet is the fastest first filter.
Test 1: the magnet test
To run the magnet test, hold a strong neodymium magnet to the flat part of the piece, and a real piece of sterling silver stays completely still. Sterling silver is not magnetic, so there is no pull, no snap and no tick. A magnet will pull a piece that has a steel core, and that is the common trick behind fake silver, because the steel core is cheap and it is what the seller saves money on. If the piece jumps to the magnet, it is not solid sterling silver. If it stays put, that is the first sign of a genuine piece, but it is not proof on its own, because some plated pieces are also non magnetic. The magnet test rules out a steel core, which is the cheapest fake, and it is the test to run first because it takes 5 seconds and costs nothing.
Test 2: the hallmark check
To run the hallmark check, look for a stamp, usually inside the clasp, the band or the back of the piece. A genuine hallmark reads 925, and it is often paired with a maker or an assayer mark. The 925 stamp tells you the alloy is 92.5% silver, and it is the single most important mark because it is the one that legally defines sterling. Look closely at how the number sits, because a real stamp is struck into the metal and the edges are sharp, while a fake stamp is often painted, etched or shallow and it wears off fast. If the piece is not marked at all, you can still tell sterling silver is real with the other tests, but the missing hallmark means the piece has no documented purity, and that is a reason to be careful. The hallmark is the one test a fake struggles to fake, because a stamped mark and a painted mark look different under a 10x magnifier.
Test 3: the sound test
To run the sound test, tap the piece lightly against a hard surface with a metal object, and a real piece of sterling silver rings clear and high, with a tone that carries for a beat. A plated or a steel fake gives a flat thud with little carry. The ring comes from the density and the elasticity of the alloy, and it is the same reason a silver coin sings when you drop it on the counter. The sound test works best on a piece with some mass, such as a ring, a coin or a flatware fork, and it is less reliable on a thin chain that rings on everything. If the ring is bright and the decay is short, that is the sound of a genuine piece, and if the tone is dead and short, that is the sound of a hollow or a plated fake.
Test 4: the weight test
To run the weight test, weigh the piece on a small scale and compare it against what a piece of its size should hold. Sterling silver has a density of about 10.5 grams per cubic centimetre, so a solid piece feels heavier in the hand than a plated piece of the same size. A 1 cm cube of sterling silver weighs 10.5 grams, and a fake steel core will be lighter by a lot. The weight test is a good second check because it is hard to fake density, and a piece that feels light for its size is usually a plated piece with a hollow or a steel body. Compare the weight to a known genuine piece of the same size, and the difference is often obvious within a couple of grams.
Test 5: the ice test
To run the ice test, place an ice cube on the flat part of the piece and watch how fast it melts. Sterling silver conducts heat well, so an ice cube on a genuine piece of sterling silver melts faster than the same cube on a plate or a counter. The faster melt is the heat being pulled out of the ice by the metal, and it is a real property of the alloy, not a trick. The ice test takes about 60 seconds and it works best on a flat surface, and it is a gentle test that will not scratch the piece. If the ice sits on the piece and barely changes, the piece is a poor conductor and it is not sterling silver.
Test 6: the cloth test
To run the cloth test, rub the piece with a white felt cloth and look at the cloth, not the piece. A real piece of sterling silver leaves tiny dark grains on the cloth, because the copper in the alloy rubs off as a fine black powder. A plated piece leaves the cloth clean, because the plating is a different metal and it does not grain the same way. The cloth test is a slow test, so it works best on a piece that is worn, such as a ring or a piece of flatware that has been handled for years. If the cloth picks up a grey or black grain, that is a sign of a genuine piece, and if the cloth stays white, that is a sign of a plated or a fake piece.
Test 7: the coin scratch test
To run the coin scratch test, scratch a small, hidden spot on the piece with the edge of a clean coin and look at the streak. A real piece of sterling silver gives a smooth grey streak with no colour transfer, because the alloy is a single metal. A plated piece gives a white streak or a faint colour transfer, because the plating peels back to reveal the metal underneath. The coin scratch test is the most aggressive of the 7 tests, so run it last and only on a spot you do not mind, such as the inside of a band. The streak tells you the body of the piece, and a grey streak that matches the piece is the sign of a genuine piece of sterling silver.
Sterling silver vs plated silver
Sterling silver vs plated silver is the question that matters most, because the two look almost the same when they are new, and the difference only shows up over time. The difference is the body, and the 7 tests above are the way you tell them apart. The table below puts the two side by side, and the hallmark and the magnet are the two tests that separate them fastest.
| Property | Sterling silver | Plated silver |
|---|---|---|
| Body | 92.5% silver throughout | Thin silver layer over a base metal |
| Magnet | No pull | Often a pull if the core is steel |
| Hallmark | 925 stamp, often with an assayer mark | No mark or a shallow fake mark |
| Weight | Heavier, 10.5 grams per cm cube | Lighter for its size |
| Wear over time | Tarnishes evenly | Wears through to a different colour |
Plated silver is not a fake in the sense of being worthless, but it is not sterling silver, and it will not hold its value the way a genuine piece does. The hallmark and the weight are the two tells that separate a real piece from a plated piece, and they are the two tests to run if you only have time for 2.
When a piece is not marked
A piece that is not marked is not automatically fake, but it is not automatically sterling silver either, and the missing hallmark is the one detail that lowers your confidence. To tell sterling silver if not marked, run the magnet test and the weight test first, because those two are the hardest for a seller to fake. A genuine unmarked piece will still stay put on a magnet, ring clear when tapped, feel dense in the hand and grain a white cloth. The 6 unmarked tests together are the substitute for the missing stamp, and if a piece passes 4 or more of them, the odds are in favour of a genuine piece. If a piece fails the magnet or the weight, the missing hallmark stops being a small detail and starts being the whole story, and the piece is a plated or a steel fake.