To tell if a gold chain is real, start with the stamp near the clasp. Look for a karat mark (10K, 14K, 18K or 417, 585, 750) next to a maker's trademark, with no plating codes like GP, GF or HGE. Then check that a magnet doesn't pull it and that no other metal shows through at the clasp or edges. Finally, see whether its weight matches the size. If a chain passes all four, it is very likely real. Only a jeweler's XRF or acid test can confirm it for certain. Below are the 7 tests jewelers rely on, in order from easiest to most accurate, plus the home "tests" you can skip.
In this article
- What is the quickest way to tell if a gold chain is real?
- Test 1: What does the stamp on a gold chain mean?
- Test 2: Does real gold stick to a magnet?
- Test 3: Is the color the same at the clasp and edges?
- Test 4: Does the chain discolor your skin?
- Test 5: Does the weight match the size?
- Test 6: What does the ceramic scratch test show?
- Test 7: How do jewelers test gold professionally?
- Which home gold tests should you ignore?
- How do you avoid buying a fake gold chain?
- FAQ
What is the quickest way to tell if a gold chain is real?
No single home test proves a chain is gold, but several passes in a row come close. Use this table to pick your tests:
| Test | What you need | How reliable | Safe for the chain? |
|---|---|---|---|
| 1. Stamp check | Your eyes or a loupe | Good first filter (stamps can be faked) | Yes |
| 2. Magnet | A strong magnet | Rules out steel and iron fakes | Yes |
| 3. Wear points | Good light, a loupe | Catches worn plating | Yes |
| 4. Skin reaction | A few days of wear | Weak clue only | Yes |
| 5. Weight and density | A 0.01 g jewelry scale | Strong, if measured carefully | Yes |
| 6. Ceramic scratch | Unglazed ceramic tile | Moderate | No, it removes a little metal |
| 7. XRF or acid test | A jeweler | Definitive | XRF yes, acid leaves a mark |
Test 1: What does the stamp on a gold chain mean?
Most real gold chains carry a tiny stamp on the clasp, the end tag or a link near the clasp. A loupe or a phone camera on zoom will help you read it. Here is what the common marks mean:
- 10K or 417: 41.7% pure gold
- 14K or 585: 58.5% pure gold, the most popular chain standard in the US
- 18K or 750: 75% pure gold
- Red flags: GP (gold plated), GEP or HGE (gold electroplate), GF (gold filled), RGP (rolled gold plate), or a fraction like "1/20 12K." Any of these means a gold layer over another metal, not solid gold.
Look for a maker's trademark next to the karat mark too. The FTC's consumer guidance is direct about it: if you see a karat mark without a trademark, don't buy the piece. A stamp is only a starting point, because counterfeiters can stamp "14K" on brass. Always back it up with at least two more tests.
Test 2: Does real gold stick to a magnet?
No. Gold is not magnetic, so a strong magnet (a neodymium magnet works best, not a fridge magnet) should not grab a real gold chain. If the links jump to the magnet, the chain has a steel or iron core under a gold-colored surface.
One caution: test the links, not the clasp. Many real gold clasps have a small steel spring inside, which can pull slightly. Also, passing the magnet test doesn't prove a chain is gold, because brass, copper and aluminum are not magnetic either. It only rules out the cheapest fakes.
Test 3: Is the color the same at the clasp and edges?
Plating wears off first at the points that rub most: the clasp, the jump rings, the edges of links and the back of the chain where it touches your neck. In good light, look for a silver, gray or coppery color showing through. Also look for flaking or a sudden change in shade.
Solid gold is the same color all the way through, so a scratch on a real chain shows more gold. A worn spot showing a different metal is one of the clearest signs of a plated chain.
Test 4: Does the chain discolor your skin?
Green or black marks on your neck usually come from copper or nickel in a plated or brass chain. Real 14K and 18K gold rarely discolors skin. This is the weakest test on the list, though. Sweat, lotions and the other metals in lower-karat alloys can occasionally leave a faint mark on real gold too. Treat a skin reaction as a reason to run the other tests, not as proof.
Test 5: Does the weight match the size?
Gold is heavy. Pure gold is about 19.3 times the weight of the same volume of water. A real gold chain feels noticeably denser in your hand than a brass or plated chain of the same size. For numbers rather than feel, compare the chain's specific gravity to these standard values from jewelry supplier Stuller:
| Metal | Specific gravity |
|---|---|
| 10K yellow gold | 11.57 |
| 14K yellow gold | 13.07 |
| 14K white gold | 12.61 |
| 18K yellow gold | 15.58 |
| Sterling silver (for comparison) | 10.40 |
How to run it: weigh the chain dry on a 0.01 g jewelry scale. Then weigh it again hanging on a thread, fully under water without touching the cup. Divide the dry weight by the weight it lost in water. A 14K yellow chain should land near 13. A result around 8 to 9 points to brass or plated base metal.
Two caveats matter here. First, a hollow gold chain is still real gold. It is simply lighter for its size, and the FTC Jewelry Guides say hollow pieces should not be described as "solid." Second, some high-end fakes use tungsten, which weighs almost the same as gold. That is why weight works best alongside tests 1 to 3.
For reference, the solid rope chain below is 22 inches long and 2.5 mm wide, and it weighs 17 grams. That is the kind of spec you should expect a seller to publish.
Solid 14K, weight published
14K Yellow Gold Solid Rope Chain, 22" 2.5 mm
17 grams of solid 14K yellow gold in a classic rope twist. The specs are listed up front, so you know exactly what you're buying.
$2,800.00 View the chain →
Test 6: What does the ceramic scratch test show?
Gently drag an inconspicuous part of the chain across the back of an unglazed ceramic tile. Real gold leaves a golden-yellow streak. A black or gray streak points to another metal. This test does rub off a small amount of metal, so skip it on any chain you care about. It also can't always see through thick plating, which is why jewelers use the next test instead.
Test 7: How do jewelers test gold professionally?
A jeweler will usually run one of two tests:
- XRF (X-ray fluorescence): the analyzer reads the metal's makeup in seconds without harming the piece. It reports the exact gold percentage, so it can tell 14K from 10K and flag plating. Evident Scientific, which makes XRF analyzers, describes the method as nondestructive and quantitative.
- Acid test: the jeweler files a tiny scratch on a test stone and applies acids rated for different karats. It is cheap and quick, but it leaves a mark, and reading the color reaction takes experience.
If a chain is expensive, sentimental or about to be bought or sold, a professional test is worth it. It is the only way to be certain.
Everyday 14K chain
14K Ice Link Chain, 2.5 mm
14K gold in yellow, white or rose, from 16" to 24". A clean, versatile chain on its own or with a pendant.
From $1,336.50 Choose your length →
Which home gold tests should you ignore?
- The bite test: modern 10K to 18K gold is too hard to dent with your teeth, and you risk chipping a tooth.
- The float test: almost every metal sinks, so sinking tells you nothing.
- The vinegar test: vinegar is too weak to reveal a plated chain reliably.
- The flame test: heat can damage solder joints and discolor alloys. It proves little and risks your chain.
How do you avoid buying a fake gold chain in the first place?
The easiest fake to spot is the one you never buy. Before paying for a gold chain, check that the seller:
- Publishes full specs: karat, width in mm, length and ideally gram weight. Vague listings like "gold chain, heavy" are a warning sign.
- Says "solid" or "hollow" clearly. Both are real gold, but they are priced very differently.
- Prices it sensibly for its weight. A 14K chain is 58.5% gold, so its gold content alone is worth roughly weight in grams × 0.585 × the day's gold price per gram. If a price is far below that, the chain isn't what the listing claims.
- Is an established jeweler you can call, visit or verify, not an anonymous marketplace listing.
The same buy-the-seller-first thinking applies to luxury watches. Our guide on how to authenticate a Rolex watch walks through the equivalent checks.
Match your chain
14K Yellow Gold Rope Bracelet, 5.7 mm
19.8 grams of 14K yellow gold, 8.5 inches long, with a secure lobster clasp.
$3,260.00 View the bracelet →
Frequently asked questions
Can a fake gold chain be stamped 14K?
Yes. Counterfeiters sometimes stamp "14K" or "585" on plated brass, which is why a stamp alone never proves a chain is real. Check for a maker's trademark beside the karat mark, then confirm with the magnet, wear point and weight tests.
Does real gold stick to a magnet?
No, gold is not magnetic. If the links of a chain are pulled by a strong magnet, it has an iron or steel core. A slight pull at the clasp alone can come from a steel spring inside and is normal.
What does 585 mean on a gold chain?
585 is the European-style mark for 14K gold. It means the metal is 585 parts per thousand (58.5%) pure gold. You'll also see 417 for 10K and 750 for 18K.
Is a hollow gold chain real gold?
Yes. A hollow chain is real gold formed around an empty center, so it is lighter and less expensive than a solid chain of the same size. It is also easier to dent. It should be sold as hollow, never as "solid."
Can I test gold at home without damaging it?
Yes. The stamp check, magnet test, wear point inspection and the weight or density test are all non-destructive. Avoid the ceramic scratch, acid and flame tests on any chain you plan to keep wearing.
Buy a chain you never have to test
Shop 14K gold chains from ECI Jewelers, with karat, width and length listed on every piece.
Shop the 14K Ice Link Chain 3.5 mm →Or browse all 14K gold chains.
