How to Tell if Gold Is Real: 7 At-Home Tests

Here’s the uncomfortable truth: a lot of the “gold” sitting in jewelry drawers isn’t gold. It’s plated, filled, or just gold-colored base metal doing a convincing impression. The good news is you can sort most of it out at home in about ten minutes, no jeweler required. Here are seven tests, roughly easiest to hardest.

1. Read the stamp (start here)

Real gold is almost always stamped with its purity. Look on the inside of a ring band, the clasp of a chain, or the post of an earring. Two systems show up:

Watch for letters next to the number. GP (gold plated), GF (gold filled), RGP (rolled gold plate), and HGE (hydrostatic gold electroplate) all mean a thin gold layer over base metal, not solid gold. If you’re fuzzy on the difference, the gold filled vs plated vs solid guide breaks down what each is worth.

2. The magnet test

Real gold is not magnetic. Hold a strong magnet (a fridge magnet won’t cut it; use a rare-earth one) near the piece. If it pulls, there’s magnetic base metal inside and it’s plated or fake. A piece that ignores the magnet still needs other checks, since brass and some fakes aren’t magnetic either.

3. The skin test

Wear the piece for a day, especially if your hands get warm or sweaty. Solid gold leaves no mark. A green stain usually means copper in a plated or low-quality piece; a black smudge points to base metals. It’s not instant, but it’s one of the more reliable everyday tells.

4. The float test

Gold is dense. Drop the piece into a glass of water. Real gold sinks quickly and sits flat on the bottom. Hollow fakes and lightweight plated pieces tend to sink slowly, wobble, or float. This won’t work on hollow gold chains (which are real but light), so treat a slow sink as a flag, not a verdict.

5. The scratch-and-look test

On a hidden spot, look closely (a loupe or phone macro helps) for worn-through edges, especially on ring shanks and clasp hinges. Plated pieces wear to a different-colored metal underneath (silvery or coppery). Solid gold is the same color all the way through, so worn areas just look like more gold.

6. The ceramic test

Drag the piece lightly across unglazed ceramic (the bottom of a mug works). Real gold leaves a gold-colored streak. Fakes leave a black or gray streak. It can mark the piece slightly, so use an inconspicuous edge and light pressure.

7. The acid test (last resort)

Jewelers use a gold testing kit with acids calibrated to each karat. A drop on a tiny scratch will hold its color on real gold and dissolve or change on fakes and lower karats. It’s accurate but mildly destructive and involves actual acid, so it’s overkill for most people. A local jeweler will usually test a piece for free or a few dollars, often with an electronic tester that’s non-destructive.

Tests that aren’t worth doing

• The bite test. Biting gold to check for softness is a movie myth. You’ll dent soft fakes (lead) and chip your teeth before you learn anything useful.
• The vinegar test. Real gold doesn’t react to vinegar, but neither do several fakes, so a no-reaction tells you almost nothing.

What to do if you’re still unsure

For anything you’re buying or selling above pocket-change value, get it confirmed before money changes hands. The stamp plus the magnet and skin tests is enough for most low-value pieces; a jeweler’s electronic tester settles the rest in a minute. Once you know what you’ve got, here’s how to price it for resale.

Browse pre-loved gold on StillSparkly.