Gold has been faked for as long as it has been traded, and the fakes have gotten better. The quickest way to tell if gold is real is to read the stamp, then confirm it with a test...
Gold has been faked for as long as it has been traded, and the fakes have gotten better. The quickest way to tell if gold is real is to read the stamp, then confirm it with a test that measures the metal itself rather than its surface. A stamp tells you what the maker claims. Density, acid and a jeweler's instruments tell you whether the claim holds.
A gold stamp, or quality mark, is a small inscription stating the purity of the metal. Pure gold is 24 karat, and every lower karat is a fraction of 24: 14K means 14 parts gold and 10 parts other metals, or 58.3% gold. Europe and much of the world use a three-digit millesimal fineness number instead, which states the gold content in parts per thousand.
|
Karat Stamp |
Fineness Stamp |
Gold Content |
Character |
|
10K |
417 |
41.7% |
Hardest, palest; the lowest karat commonly sold as gold jewelry in the US |
|
14K |
585 |
58.3% |
The everyday standard; strong color with good scratch resistance |
|
18K |
750 |
75.0% |
Richer, warmer color; softer than 14K |
|
22K |
916 |
91.6% |
Deep yellow; too soft for most daily-wear men's pieces |
|
24K |
999 |
99.9% |
Pure gold; bends and scratches easily |
Fineness numbers round slightly differently from karats. A 585 stamp means 58.5% gold, a hair above the 58.3% of a true 14/24, and the two are treated as equivalent. If you want to know how to tell if gold is real, this table is where it starts: a mark that does not appear here, or appears with extra letters, deserves a second look.
Some stamps are honest disclosures that the piece is not solid gold. Under the FTC Jewelry Guides, a karat mark on its own should mean the metal is that karat throughout. Letters after the karat change the meaning entirely.
GP, GEP or HGE: gold plated, gold electroplated, or heavy gold electroplate. A thin layer over a base metal such as brass or copper.
GF or 1/20 14K GF: gold filled. A thicker layer of karat gold bonded to a base metal, making up at least 1/20th of the total metal weight.
RGP: rolled gold plate. Similar to gold filled, with a thinner layer.
925 alongside a gold color: sterling silver, often gold vermeil. Under FTC rules, vermeil means sterling silver coated with gold of at least 10K and at least 2.5 microns thick.
Vermeil is a legitimate material with real gold on real silver, not a fake. It is simply not solid gold, and it should never be priced as solid gold. We explain the difference in detail in what 18K gold vermeil is and how it compares to plating.
On chains, look at the clasp or the small flat tag beside it. On rings, look inside the band. On pendants, check the bail or the back of the piece. You will usually need a 10x loupe; most stamps are under a millimeter tall.
A proper mark in the US pairs the quality stamp with a maker's trademark, the name or symbol of the company standing behind the claim. A bare "14K" with no maker's mark is not proof of a fake, but it is a reason to look closer.
Stamps can be forged, and they are, routinely. Three warning signs deserve attention:
The stamp is crooked, shallow or uneven, as if struck by hand on a finished piece.
The only stamp is on the clasp. Clasps are sometimes solid gold on a plated chain, so check the chain end and the jump rings too.
The price sits well below the value of the gold itself. Solid gold has a floor set by the metal market, and no honest seller goes beneath it.
That last point is why Aequa & Co. prices every piece against current gold and silver market values, a method we lay out on our fair pricing page. When you know what the metal is worth, an impossible price becomes easy to spot.
Knowing how to tell if gold is real at home comes down to choosing the right test. Home tests fall into two groups: those that cannot hurt the piece, and those that can. Start with the first group. Each test rules out certain fakes, and none is conclusive alone.
Gold is not magnetic. Hold a strong neodymium magnet near the piece; if it pulls, the metal underneath is steel or iron. Two cautions: clasps contain small steel springs, so test the body of the piece, not the clasp. And many fakes (brass, copper, some tungsten alloys) are not magnetic either, so passing this test proves very little.
Look at the high-contact points: clasp edges, the underside of a ring, the links that rub against your collar. Plating wears first at these spots, and a different-colored metal (coppery red, pale grey or white) showing through means the gold is only a coating. Green or black marks on your skin after wear point the same way.
Gold is one of the densest metals you will ever hold, which is why a real gold chain feels heavier than it looks. To measure it, weigh the piece in grams, then submerge it in a graduated container of water and note how much the level rises in milliliters. Divide weight by volume. Pure gold is 19.3 g/cm³, 18K yellow gold falls around 15.2 to 15.9, and 14K yellow gold around 12.9 to 14.6. Brass and plated base metals sit near 8 to 9.
This test works best on heavier pieces, since a small chain displaces too little water for a kitchen measurement to be precise. Its known weakness is tungsten, which is almost as dense as gold and is used inside sophisticated fakes.
Drag the piece firmly across the unglazed underside of a ceramic tile or plate. Real gold leaves a gold-colored streak; a black or grey streak suggests another metal. This test scratches the piece, so use a hidden spot, and remember it only reads the outer layer.
Acid testing kits use nitric acid solutions calibrated to specific karats. A tiny scratch is made on a testing stone, a drop of acid is applied, and the reaction shows whether the metal meets 10K, 14K or 18K. It is accurate and inexpensive, but it involves a corrosive chemical and a small mark on the piece. For anything valuable or sentimental, let a jeweler do it.
Skip the tests you see repeated online without evidence: biting gold, the vinegar test and the float test. They prove nothing reliable and can damage softer pieces.
A reputable jeweler has three tools you do not. An electronic gold tester measures the electrical conductivity of the metal and returns a karat reading in seconds. An XRF (X-ray fluorescence) analyzer reads the exact elemental makeup of the surface without leaving a mark. And a trained eye catches the tells: solder joints, color mismatches, link construction that no fine jewelry workshop would produce.
Even XRF reads the outer layer, so a heavily plated fake can occasionally fool it. When a high-value piece is in doubt, jewelers combine surface readings with density or a discreet acid test to confirm the metal is consistent throughout. Most will do a basic check for little or no charge, and it is the only answer worth trusting before you buy or sell something expensive.
Yes. White gold is real gold alloyed with white metals such as palladium, silver or nickel, which pull the natural yellow toward a pale grey. It carries the same karat stamps as yellow gold: 14K white gold is still 58.3% gold. Most white gold is then plated with rhodium, a bright white platinum-group metal, for its mirror finish.
That rhodium layer wears with time, and the warmer tone of the underlying alloy starts to show. Men sometimes mistake this for a fake. It is not. A jeweler can replate it in under an hour. A piece like the TRI PENDANT ROLO CHAIN NECKLACE in 14K white gold is solid karat gold through every link, with the rhodium finish serving as polish, not disguise.
Pure 24K gold does not tarnish. Gold does not react with oxygen or moisture, which is why ancient gold objects come out of the ground still bright. Karat gold is a different story, because the other metals in the alloy can react.
The lower the karat, the more alloy, and the more likely a faint dulling over time. 10K can darken slightly with sweat, chlorine or cologne. 14K and 18K rarely show more than a light film that a soft cloth removes. Rose gold, rich in copper, can deepen in tone over the years, which many men come to prefer.
So a slight change in color does not mean your gold is fake. Heavy black tarnish, flaking, or a completely different metal showing through does. For how solid gold ages against silver in daily wear, see our comparison of solid gold vs sterling silver for men.
The simplest way to know if jewelry is real gold is to buy from a maker who names every material. Look for the exact karat, whether the piece is solid or hollow, and what, if anything, sits on the surface. Vague phrases like "gold tone," "gold finish" or "gold color" describe a look, not a metal.
Hollow chains are a subtler issue. They are real gold, with thin walls around an empty core, which makes them light, prone to dents, and nearly impossible to repair once crushed. Aequa & Co. does not use hollow metals. A chain such as our SQUARE ROLO CHAIN in solid 18K yellow gold is dense through every link, and you can feel the difference the first time you pick it up.
The house artisans at Aequa & Co. carry three generations of jeweller's heritage crafting for the great fashion maisons, and they judge gold the same way a buyer should: by weight, by finish, and by what the stamp is backed by. If you are thinking of gold as something that holds value over decades, our guide to solid gold men's jewelry as an investment is the natural next read.
Start with the stamp: check the clasp, ring band or bail for a karat or fineness mark such as 14K or 585 and a maker's mark. Then use a magnet (real gold is not magnetic), inspect high-wear spots for a different metal showing through, and try a density test on heavier pieces. For a definitive, mark-free answer, ask a jeweler for an electronic or XRF test.
A 14K stamp means the maker claims the piece is 58.3% gold throughout. On pieces from reputable sellers, it is reliable. Stamps can be forged, though, so look for a maker's mark beside it, check that the stamp is crisp and even, and be wary if the price sits below the gold's market value. Letters like GP or GF after the stamp mean plated or gold filled.
Yes. White gold is real gold mixed with white metals such as palladium or silver, and it carries the same karat stamps as yellow gold. Most white gold is plated with rhodium for a bright finish. When that plating wears, a slightly warmer tone appears. This is normal and does not mean the piece is fake; a jeweler can replate it quickly.
Pure 24K gold does not tarnish. Karat gold such as 10K, 14K and 18K contains other metals that can cause slight dulling over time, especially in lower karats exposed to sweat, chlorine or perfume. A soft cloth usually restores it. Heavy black tarnish, flaking or a different metal showing through suggests plating rather than solid gold.
A 585 stamp means the piece is 58.5% gold, the European fineness mark treated as equivalent to 14 karat (58.3%). Other common fineness stamps are 417 for 10K, 750 for 18K, 916 for 22K and 999 for pure 24K gold. These numbers express gold content in parts per thousand and appear on jewelry made or sold across Europe and much of Asia.
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