How to Test If Gold Is Real at Home (7 Methods)

June 22, 2026

You can't prove gold is real at home with certainty, but you can rule out most fakes in a few minutes. The most reliable home test is the density (specific-gravity) test; the quickest first checks are the hallmark and the magnet. Here's how each one works, and which ones lie to you.

What's the fastest way to check if gold is real?

Look for a hallmark first — it's free and takes seconds. Real gold jewelry is almost always stamped with its purity: 10K, 14K, 18K or the millesimal version 417, 585, 750. Marks like GF (gold-filled), GP or HGE (plated), and 925 (that's sterling silver, not gold) tell you it is not solid gold. A stamp isn't proof — fakes get stamped too — but a missing or misspelled stamp is a strong warning sign. We break the numbers down in what 417, 583, and 750 mean.

Does real gold stick to a magnet?

No. Gold is not magnetic, so if a piece jumps to a strong magnet, it has a magnetic core or is mostly base metal. But passing the magnet test proves little — brass, copper, lead, and aluminum aren't magnetic either, so plenty of fakes sail right through. Use a strong neodymium magnet, not a fridge magnet, and remember clasps and spring rings are often steel even on genuine chains.

Can the ceramic scratch test tell real gold?

Drag the piece across an unglazed ceramic tile (the back of a bathroom tile works). Real gold leaves a gold streak; fool's gold and plated base metal leave a black or greenish-gray streak. It's a useful tiebreaker, but it scratches the item, so don't do it on anything you want to keep pristine.

Do the float and vinegar tests work?

Sort of. Gold is very dense (19.3 g/cm³ pure), so a solid gold piece sinks fast and sits dead on the bottom — anything that floats or drifts is suspect. The vinegar test (a few drops on the metal) is supposed to leave real gold unchanged while base metals discolor. Both are crude: a dense fake still sinks, and vinegar is too weak to be conclusive. Treat them as hints, not verdicts.

What about the acid test?

This is what many dealers actually use. A gold testing kit has graded nitric-acid solutions for 10K, 14K, 18K, and 22K. You rub the gold on a testing stone, apply the matching acid to the streak, and watch: if the streak dissolves or turns milky, the gold is below that karat; if it holds, it's at or above it. It's accurate in skilled hands but uses corrosive acid, can damage the piece, and only tests the surface — a thick plating can briefly fool it. Work in ventilation, wear gloves, and never guess with acid on a customer's heirloom.

What's the most accurate test you can do at home?

The density (specific-gravity) test, because it measures the whole object, not just the surface a plating can hide. You need a scale that reads to 0.01 g and a cup of water. Weigh the piece dry, then weigh it fully submerged (hung from a thread so it doesn't touch the cup), and divide:

Specific gravity = weight in air ÷ (weight in air − weight in water)

Example: a chain weighs 10.00 g dry and 9.25 g submerged. That's 10.00 ÷ (10.00 − 9.25) = 10.00 ÷ 0.75 = 13.3 — right in the 14K range. Compare your result to typical yellow-gold values:

Densities shift a little with alloy color (white and rose gold differ), and hollow or stone-set pieces throw the number off, so use it as a strong indicator rather than a lab result. A reading near 8–9 points to brass or bronze; near 10.5 suggests silver; near 11.3, lead.

When should you stop testing at home?

When real money is on the table. Home tests narrow things down, but the only definitive answers come from an XRF analyzer or a professional assay — both standard at any serious buyer or refiner. If a piece passes your checks and you want to know what it's actually worth, weigh it, read the karat, and run the melt math. Our step-by-step scrap gold guide walks through the formula, and the calculator does it instantly against live spot prices for gold, silver, and platinum.

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