How to tell if gold jewelry is real: five checks that take one minute
Five checks you can do at home in under a minute to tell solid, filled and plated gold apart — no tools beyond what's already in your kitchen.
Part of our guide: Everyday gold jewelry
The short answer
To tell if gold jewelry is real, check the hallmark, then the wear points, then the density. Solid gold is usually stamped 10k, 14k or 18k, or with the European numbers 417, 585 and 750, inside a ring band, on a clasp or on an earring post. Stamps such as GP or HGE mean plated, and GF means gold-filled, so in 14k GP the karat describes the plating, not the piece. A missing mark is a warning, not proof, and a mark alone proves little because stamps are easy to fake. Next, look at high-contact points such as the underside of a ring: plating changes color there first, often within months. Gold is not magnetic, so a clear pull rules out solid gold, while no pull proves little. Real gold sinks in water, but so does brass; only a density check with a kitchen scale tells them apart.
To tell if gold jewelry is real, start with the hallmark, then check where the piece wears hardest, then weigh it against water. Solid, filled and plated gold can look identical in a listing photo and behave completely differently within a year. None of the first checks need special equipment, and together they take about a minute.
What do gold hallmarks like 14K, 585 and 750 mean?
Solid gold is usually stamped with a purity mark: 10k, 14k, 18k, or the European numbers 417, 585 and 750. Look inside a ring band, on the clasp of a chain or on the post of an earring. In the US, the FTC Jewelry Guides set how gold content may be described, and a karat mark is meant to be accurate to the whole piece. No mark at all is a warning sign, not proof: old, handmade and resized pieces sometimes lose theirs. A mark alone is not proof either, because stamps are easy to fake. Treat the hallmark as the first clue, then confirm with the checks below.
How can you tell if gold jewelry is plated?
Plated jewelry often says so on the stamp, if you know the codes. These all mean a thin gold layer over another metal, not solid gold:
- GP, GEP, HGE, EP: gold plated, gold electroplated, heavy gold electroplate.
- RGP: rolled gold plate, a thicker bonded layer, still not solid.
- GF, 1/20 14k, 14/20: gold-filled, a much thicker bonded layer that wears for years but is not solid gold.
- 925 with a gold color: gold vermeil or plated sterling silver.
If the stamp reads 14k GP or 18k HGE, the karat number describes the plating, not the piece.
Look at the wear pattern
Check the highest-contact points: the underside of a ring, the palm side of a bracelet, the clasp of a chain. Plating shows a color change at exactly these points first, often within months, as the thin layer wears through to a silver, pink or brassy base. Solid and gold-filled pieces wear evenly, because the color goes all the way through or the layer is thick enough not to matter.
How do you tell if a ring is real gold?
Rings get the most wear of any jewelry, which makes them the easiest to judge. Look inside the band for a karat stamp and, often, a maker's mark. Then check the inner surface where it rubs your finger all day: a plated ring shows its base metal there first. A green or dark mark on your finger after wearing it points to copper or other base metals near the surface, which means either low-karat gold or plating. A ring that has been resized may show a slightly different color at the solder seam; that alone is normal and not a sign of a fake.
Does the magnet test show if gold is real?
Gold is not magnetic. Hold a strong magnet (a fridge magnet is too weak) close to the piece. A clear pull means there is iron or steel inside, so it is not solid gold. No pull proves less than it seems: many fakes use brass or copper, which are not magnetic either. Clasps and springs often contain steel even on real pieces, so test the body of the chain, not the clasp.
The water test that actually works: density
You may see a “float test” online, where real gold sinks and fakes float. It does not work: brass, copper and steel all sink too. What does work is measuring density with a kitchen scale that reads to 0.01 g:
- Weigh the piece dry and note the weight.
- Put a cup of water on the scale and zero it.
- Hang the piece on a thread so it sits fully under water without touching the cup, and note the new reading.
- Divide the dry weight by that reading. The result is the specific gravity.
| Metal | Specific gravity (approx.) |
|---|---|
| 24k gold | 19.3 |
| 18k yellow gold | 15.2 to 15.9 |
| 14k yellow gold | 12.9 to 14.6 |
| 10k yellow gold | 11.1 to 11.6 |
| Sterling silver | 10.4 |
| Brass, copper, steel | 7.9 to 9.0 |
Works for solid pieces without stones. Hollow chains, stones and trapped air throw the result off, so treat it as a strong hint, not a verdict.
Which gold tests should you leave to a jeweler?
Acid kits and the ceramic scratch test both work by removing a little metal, and a mistake leaves a mark on the piece. An electronic tester or an X-ray (XRF) reading at a jeweler is quick, does no damage and is often free when you are there anyway. For anything valuable, inherited or bought secondhand, that is the check to trust.
If it fails
No single check confirms authenticity, but two or more pointing the same way is a reliable signal. If it turns out to be gold-filled or plated, it can still be worth keeping: see which gold survives water and how to clean it without stripping the layer. If it is solid, 14k vs 18k explains what the number means for daily wear, and our complete gold jewelry guide covers the rest.
Reading the stamp properly
The stamp is the first thing to check and the most commonly misread. A number alone — 585, 750, 916 — is the European millesimal mark, and translates to 14k, 18k and 22k respectively. A number followed by "K" is the karat system. Both are legitimate.
What matters is the letters after it. GF means gold-filled: a thick bonded layer, genuinely durable, often decades of wear, but not solid. GP or HGE means plated or heavy gold electroplate — microns thick, and it will wear through. GB is gold-bonded, effectively plating. And 925 with a gold color means gold-plated sterling silver, sometimes sold as vermeil, which is a real and reasonable category as long as you know that is what you are buying.
A piece with no stamp at all is not automatically fake — very old pieces often predate stamping requirements, and some pieces have had the stamp polished away. But on anything modern, no stamp is a reason to test before you trust.
Two more tests worth knowing
The density check. Gold is remarkably heavy — 19.3 g/cm³ against about 8 for brass. Weigh the piece, then measure how much water it displaces in a narrow measuring jug. Divide grams by milliliters. Solid 14k lands around 13, 18k around 15.5. Anything under 11 is not solid gold whatever the stamp says. This is the most reliable home test there is.
The magnet test, done properly. Gold is not magnetic, but neither is brass, so a fridge magnet proves very little. A rare-earth magnet is different: pass it slowly past a suspended piece and watch for any drag at all. Steel and nickel cores show themselves immediately. Clasps often are magnetic even on genuine gold chains, so test the body of the piece.
The tests you should not do
The scratch-and-acid test destroys a small patch of the piece and is genuinely dangerous without proper handling — nitric acid causes serious burns. The ceramic scratch test damages the surface for very little information. And the bite test tells you almost nothing except that lead is soft, which is a different problem entirely.
When to stop guessing and get it tested
If the piece cost real money, or you are being asked to pay real money for it, an XRF test at a jeweler takes about a minute, does not mark the piece, and typically costs very little or nothing if you are buying from them. Any home test gives you a probability. XRF gives you the actual alloy composition, and on anything above a couple of hundred pounds that certainty is worth the trip.
Read next: Nickel Allergy Jewelry: What Is Safe to Wear
Questions people ask about this
How can you tell real gold from fake at home?
Check for a purity hallmark, look at the high-contact points for color wear, test with a strong magnet, and, for solid pieces, measure density with a kitchen scale. No single test is conclusive, but two or more agreeing is a reliable signal.
How do you know if a ring is real gold?
Look inside the band for a karat stamp such as 14k or 585, then check the inner surface where it rubs your finger: plated rings show their base metal there first. A green mark on your skin points to copper near the surface, which means low-karat gold or plating.
How can you tell if gold is plated?
Plated pieces are often stamped GP, GEP, HGE, EP or RGP, and gold-filled pieces GF or 1/20. Plating also shows a different-colored metal at the edges and contact points as it wears.
Does real gold sink or float in water?
Real gold sinks, but so do brass, copper and steel, so sinking proves nothing. Measuring density with a kitchen scale is the water test that actually tells metals apart.
Is gold magnetic?
No. A clear pull toward a strong magnet means iron or steel inside, which rules out solid gold. No pull proves little, because brass and copper fakes are not magnetic either.
Why does gold jewelry turn my skin green?
It is a reaction to copper in the alloy or the base metal, usually meaning low-karat gold or a base-metal piece with a thin gold coating.
