How to Tell If Gold Is Real (At-Home Tests)
How-To Guides
Wondering how to tell if gold is real without a trip to the jeweler? You can get a very good idea right at your kitchen table with a few simple at-home tests. None of them are perfect on their own, but stack two or three together and you will know whether that ring, chain, or coin is solid gold, gold-plated, or something else entirely.
Start with the Hallmark Check
Real gold is almost always stamped. Grab a magnifying glass or your phone's zoom and look for a tiny mark on the inside of a ring band, the clasp of a necklace, or the back of a pendant. You are looking for a karat stamp like 10K, 14K, 18K, or 24K, or the European three-digit version: 417, 585, 750, or 999. Those numbers tell you the gold content as a fraction of 1000, so 585 means 58.5% pure (the same as 14K).
If instead you see letters like GP (gold plated), GF (gold filled), GEP (gold electroplated), or HGE (heavy gold electroplate), the piece only has a thin layer of gold over a base metal. A missing stamp does not automatically mean fake, since old or handmade pieces sometimes have none, but a clear karat mark is your best first clue. Want help decoding every symbol? See our guide on how to read gold hallmarks.
The Magnet Test
Gold is not magnetic. Hold a strong magnet (a rare-earth magnet from a hardware store works far better than a fridge magnet) near your piece. If it jumps to the magnet or feels any pull, there is magnetic metal inside and it is not solid gold. The catch: many fakes use non-magnetic base metals like copper or brass, so passing the magnet test does not prove gold. Think of it as a quick way to rule out obvious fakes, not to confirm the real thing.
The Skin and Ceramic Tests
Two easy checks at home:
- Skin test: Hold the item in a clean, sweaty hand for a few minutes. Real gold does not react with skin. If your skin turns green or black, the metal is likely plated or an alloy with a lot of copper or nickel.
- Ceramic streak test: Drag the piece gently across an unglazed ceramic tile (the rough underside of a plate works). Real gold leaves a gold-colored streak. A black or gray streak points to fake or plated metal. This can leave a faint mark on the item, so use a hidden spot.
The Float Test
Drop your item into a glass of water. Gold is dense and heavy, so real gold sinks quickly to the bottom. If it floats or drifts down slowly, it is probably not solid gold. This is a fun, harmless test, though it only catches lightweight fakes.
The Density (Water Displacement) Test
This one is the most reliable home test because it measures density, and gold is extremely dense at about 19.3 grams per cubic centimeter. Here is the method:
- Weigh your item in grams on a small scale.
- Fill a measuring cup with water and note the level in milliliters.
- Drop the item in and note the new level. The difference is the volume in milliliters (which equals cubic centimeters).
- Divide weight by volume to get density.
Worked example: Say a chain weighs 38.6 grams and raises the water level by 2 milliliters. 38.6 divided by 2 equals 19.3 g/cm3, which lines up perfectly with pure gold. A 14K piece would land closer to 12.9 to 14.6 g/cm3. If your number comes out around 8 or 9, you are likely looking at brass or plated steel.
Gold Density Reference
| Metal | Approx. Density (g/cm3) |
|---|---|
| 24K Gold | 19.3 |
| 18K Gold | 15.2 to 15.9 |
| 14K Gold | 12.9 to 14.6 |
| 10K Gold | 11.5 to 11.6 |
| Sterling Silver | 10.4 |
| Brass | 8.4 to 8.7 |
The Acid Test (and Why You Might Skip It)
Jewelers use small bottles of nitric acid to test karat. A drop on a hidden spot reacts differently depending on purity. Home acid kits exist, but acid is hazardous, can damage your piece, and is easy to misread. For most people, the density test plus a hallmark check is safer and accurate enough. Save the acid for the pros.
When to See a Professional
If your piece might be valuable, has gemstones, or you are about to buy or sell, get it verified. A jeweler can run a non-destructive XRF scan that reads exact metal content in seconds. This matters most before a sale; learn more in our guide on how to sell gold safely. Curious what real gold is actually worth once confirmed? Run the numbers with our scrap gold calculator and check live prices on our metal price charts.
Frequently Asked Questions
Does real gold pass the magnet test?
Yes, real gold is not magnetic, so it will not stick to a magnet. But some fakes use non-magnetic metals too, so passing the magnet test alone does not confirm gold. Pair it with the density test for a confident answer.
Will the ceramic streak test damage my jewelry?
It can leave a very faint mark, so always test on a hidden area like the inside of a band. The mark is usually polishable, but if you are worried, stick to the magnet and density tests instead.
Can gold-plated items have a karat stamp?
Plated items are usually marked GP, GF, or GEP rather than a plain karat number. If you see only "14K" with no extra letters, it is more likely solid, but confirm with a density test or a jeweler's XRF scan.
Once you have confirmed your gold is real, log it in BigStash.app with photos and its karat so the app can track its melt value against live metal prices over time.