The stamp says fourteen karat. That does not prove it is gold.
A karat stamp is a claim, not proof — fake pieces can carry misleading stamps. But there are checks you can run in seconds that catch most of what turns up on flea market tables and in job lots. Used together, they tell you when to walk away, and when a piece deserves a proper test.
1. Read the small letters, not just the number.
Next to the karat mark, look for two-letter codes. GP means gold plated. GF means gold filled — a gold layer of at least 1/20 of the piece's metal weight, at least 10K. HGE means heavy gold electroplate. GEP means gold electroplate. And EPNS — electroplated nickel silver — is a thin silver coating over a copper-nickel-zinc base that contains no silver at all. A piece stamped "14K GP" is a coating, not solid 14K.
2. Check the edges and the clasp.
Plating wears first where a piece rubs: the underside of a ring, chain links near the clasp, earring posts, edges and corners. If a different-coloured metal is showing through at those points, the piece is plated, not solid. Solid metal is the same all the way through.
3. Try a magnet — and know its limit.
Gold and silver are not magnetic, so a strong pull is a red flag. But no pull proves nothing: plenty of fakes are not magnetic either, and clasps, springs, and mixed parts can complicate the result. The magnet can rule a piece out. It can never rule one in.
4. Remember that even the pros have a limit.
XRF scanners read the surface of a piece — microns deep. Thick plating or a gold-filled layer can dominate the reading and hide the base metal underneath. That's why professionals test a worn spot or an edge as well as a clean face.
Use the checks together, and if real money is on the line, get the piece tested properly before you buy.
Want to go deeper? Our guide Fool's Gold: Spot Fake, Plated & Filled Jewelry Before You Buy covers the full field kit — find it on our Resources page.
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