How to Verify Real Gold: Tests Ranked by What They Actually Prove
Home tests can catch a crude fake. Only professional testing can rule out a good one. Here is what each method actually establishes.
No single home test proves gold is real. Several together can rule out an obvious fake, and dimensions plus weight is the most useful of them. Ruling out a well-made counterfeit needs equipment you do not have at home.
Key takeaways
- Gold is unusually dense, so weight against size is the most revealing simple test.
- Gold is not magnetic, but neither are many metals used in fakes.
- Acid testing marks the piece and only tests the surface.
- Electronic testers and ultrasound are what professionals actually rely on.
- Buying from an established dealer is worth more than any test you can run.
We do not sell bullion
Vanhess is a jewellery shop in Coquitlam, British Columbia. We sell solid gold jewellery. We do not sell, buy or broker bars, coins, ingots or wafers, and we are not a bullion dealer or a financial advisor. This page explains how bullion works so you can compare it fairly with jewellery. It is not a recommendation to buy anything.
The tests, ranked
| Test | What it proves | What it misses |
|---|---|---|
| Weight against dimensions | A lot. Gold is very dense, and most substitutes are not | Tungsten has a similar density and is the classic counterfeit core |
| Magnet | Rules out iron and steel cores | Most fake fillers are not magnetic either |
| Visual and hallmark check | Catches crude fakes and wrong markings | Marks can be copied convincingly |
| Ping or sound test | Gold has a distinctive ring | Very unreliable, easily misread |
| Acid test | Surface karat, on jewellery | Only tests the surface, and marks the piece |
| Electronic conductivity tester | Reads deeper than surface | Equipment cost, needs skill |
| Ultrasound or X-ray fluorescence | The reliable answer | Professional equipment only |
Why density is the useful one
Gold is remarkably heavy for its size. A genuine bar or coin has both a specified weight and specified dimensions, and a fake has to match both at once. Most cheap substitutes cannot, so a bar that is the right weight but slightly too thick, or the right size but too light, is telling you something important.
Be careful
Tungsten is the reason this is not conclusive. Its density is very close to gold's, which is exactly why it is used in the better counterfeits. A tungsten core plated in real gold can pass weight, dimension and magnet tests together.
The best protection is not a test
It is where you buy. An established dealer with a physical address, a long trading history and a published buy-back price has far more to lose from selling one fake bar than they could gain. That structural incentive protects you better than anything you can do with a magnet at the kitchen table.
For jewellery, any jeweller can test a piece for you, and most will do it quickly. If you have inherited pieces of unknown provenance, that is the sensible first step.
Frequently Asked Questions
How can I tell if gold is real at home?
Check the weight against the dimensions, since gold is very dense, and look for hallmarks. A magnet rules out iron or steel. None of these is conclusive, because tungsten has a density close to gold's and is used in better counterfeits. For certainty you need professional testing.
Does real gold stick to a magnet?
No, gold is not magnetic. But that test only rules out iron and steel, and most metals used in counterfeits are not magnetic either. Passing a magnet test proves very little on its own.
Can a jeweller test my gold?
Yes. Most jewellers can test gold quickly, usually with an acid test or an electronic tester, and tell you the karat. This is the practical route for inherited or unmarked jewellery where you want to know what you actually have.
What is the most reliable gold test?
X-ray fluorescence and ultrasound testing, both of which require professional equipment. They read beyond the surface, which is what matters when the concern is a plated core rather than a wrong surface alloy.