Fake gold chains are everywhere, and some are good enough to fool a casual glance. Plated brass, gold-tone steel and even tungsten-core fakes can look convincing in photos and in person. Whether you bought a chain online, inherited one or are thinking of buying second-hand, it helps to know how to check.
This guide covers simple checks you can do at home and the professional tests that give a definite answer.
Start with the stamp
Most real gold chains carry a stamp, usually on the clasp, the end link or a small tag near the clasp. Look for:
- Karat marks: 10K, 14K, 18K, 22K, 24K (sometimes written 10KT, 14KT and so on).
- Fineness marks: 417 (10K), 585 (14K), 750 (18K), 916 (22K), 999 (24K).
- Maker’s mark: letters or a symbol identifying the manufacturer.
Use a phone camera at maximum zoom or a jeweler’s loupe. Marks that indicate plating or filled gold include GP, GEP, HGE, HGP, RGP and GF.
Important: a stamp is a good sign, but not proof. Counterfeiters can stamp “14K” on anything. And some genuine chains, especially older or handmade ones, have no stamp. Treat the stamp as the first clue, not the final answer.
The magnet test
Gold is not magnetic. Hold a strong magnet, such as a neodymium magnet, close to the chain. If the chain jumps to the magnet or sticks firmly, it contains a magnetic metal like iron or nickel and is not solid gold.
The limit of this test: many fake metals, like brass, copper and some stainless steels, are not magnetic either. A chain that does not react to a magnet could still be fake. The magnet test can rule a chain out, but it cannot prove it is gold. Note that a strong clasp spring may react slightly even on a real gold chain, so test the links rather than the clasp.
Look at wear points
Plating wears off at points of friction. Check:
- The inside surfaces of the links, where they rub together.
- The clasp and the area around it.
- The edges of the links.
If you see a silver, reddish or grey color showing through the gold, the chain is plated. Solid gold looks the same color throughout, even where it is worn.
Check the weight
Gold is very dense. A solid gold chain feels heavier than you might expect for its size. If you know the width and length, compare its weight with typical weights for solid gold chains of that size. A chain that feels very light is likely hollow or not gold. One that is extremely heavy could, in rare cases, have a dense tungsten core, which is a known counterfeiting method because tungsten has a similar density to gold.
The skin test
Some fake gold leaves a green or dark mark on the skin after wear, caused by copper or other base metals reacting with sweat. Real gold, especially 14K and above, rarely does this. Lower karats can occasionally discolor skin, so this is only a rough indicator.
The ceramic scratch test (use with caution)
Rubbing gold on an unglazed ceramic tile leaves a gold-colored streak, while many fakes leave a black or grey streak. However, this test scratches the chain and can damage it. We do not recommend it on a chain you care about, and it is less reliable than professional testing.
Tests to avoid at home
- Biting: it does not prove anything useful and can damage the chain and your teeth.
- Vinegar or bleach soaks: chemicals can damage gold alloys and do not give a reliable result.
- Home acid kits without experience: nitric acid is dangerous and the results can be misread.
Professional tests
Acid testing
A jeweler files a tiny mark on an inconspicuous spot, often near the clasp, and applies acids of different strengths. The reaction shows the approximate karat. It is fast, inexpensive and widely available.
Electronic gold testers
These devices measure the electrical properties of the metal and estimate the karat without visible damage. They are quick and common in jewelry stores and gold buyers.
XRF analysis
X-ray fluorescence analyzers give a precise reading of the metal composition at the surface without damaging the piece. Many gold dealers and pawn shops use them. XRF only reads the surface, so a thick plating over a different core may need further testing.
Specific gravity testing
Weighing the chain in air and in water gives its density, which can be compared with known values for each karat. It is a good check against dense cores and plating, and it is non-destructive.
Where to get a chain tested
Local jewelers, gold buyers and pawn shops usually offer testing, often for free or a small fee, especially if they think you might sell. For a valuable chain, a jeweler who does appraisals can test it and provide a written report.
Red flags when buying
- A solid gold price that is far below the value of the gold content.
- No weight given, or vague metal descriptions like “gold color”.
- Sellers who refuse testing or a return if the chain does not test as described.
- Stamps that look crooked, shallow or inconsistent.
- Pressure to buy quickly, especially in person on the street or through social media.
Bottom line
Use the stamp, the magnet, wear points and weight as quick screening checks. If a chain passes those and matters to you, get it tested by a jeweler. Professional testing is cheap and fast, and it turns uncertainty into a clear answer.
Shopping for a chain?
Compare current prices, weights and reviews for gold tester options on Amazon. Always check the stated karat, construction and gram weight before you buy.
Frequently asked questions
Does real gold stick to a magnet?
No. Gold is not magnetic. If a chain sticks strongly to a magnet, it is not solid gold, although a non-magnetic result does not prove it is gold.
Is a 14K stamp proof that a chain is real?
No. Stamps can be faked. A stamp is a good first sign, but only testing confirms the metal.
How much does it cost to test gold?
Many jewelers and gold buyers test for free or a small fee. Written appraisals cost more and are usually only needed for valuable pieces.
Can fake gold chains pass a weight test?
Some can. Tungsten-core fakes are made to match gold’s density. That is why professional testing, such as XRF or specific gravity testing, matters for valuable pieces.
