How To Spot Fake Gold

Last Updated: June 8, 2026

Have you ever been lucky enough to inherit a piece of gold jewelry? If and when that happens, you may find yourself wondering if what you have is authentic. How can we be sure that a gold item is the real deal?

While at-home gold tests are simple and convenient, they aren’t always definitive. DIY methods like the float test, skin test and magnet test may not account for the other metals that gold alloys contain. Here’s a quick rundown on common gold tests and what you should know.

Keep in Mind: Alloys May Tarnish Test Results

It’s unlikely that the piece of jewelry you’re testing is 100% pure gold. 24k jewelry is rare, because gold is too soft on its own to withstand daily wear. With pure gold, even just clanking a bracelet or ring against a hard surface could dent it! However, adding small amounts of other metals like silver or copper to gold-based jewelry can really boost durability.

This is why gold alloys like 22k, 18k and 14k are the most practical choices for jewelry. But the other metals in these alloys may create discrepancies in your at-home test results. For example – iron, nickel and cobalt are all magnetic, so any gold jewelry containing one or more of these metals might “fail” the magnet test, even though the piece still contains real gold.

The methods listed below are great to try as preliminary checks, but they are not conclusive tests for gold authenticity. If you need to investigate further, you can always head to a professional jeweler for a second opinion. And if you’re simply wondering about gold content for the sake of selling your jewelry, sending it to a refinery is the best way to test the material and get the highest value for your metals!

Float Test

The float test is simple: drop your item into a glass of water. If it floats, it’s fake. If it sinks, it may be real gold. Genuine gold will always sink because it’s much denser than water. (Fun fact: gold is very dense, almost twice as dense as silver!)

However, sinking alone doesn’t confirm real gold. Many other metals, including silver, copper, nickel and iron are also dense enough to sink in water. This means that a sinking item could still be made of non-gold metals, so further testing is needed. But if your jewelry floats, you definitely know it’s fake.

Skin Test

Hold your jewelry between your hands for a few minutes to see if it reacts with your skin. Because gold is non-reactive, an alloy with real gold will not create any discoloration. Fake gold, however, could leave green, black, or blue marks behind. Copper-heavy alloys like brass and bronze are the most likely to turn your skin green.

Magnet Test: Use with Caution

The magnet test is often misused, so be skeptical of any potential gold buyer who uses this method to appraise your items. While the method makes sense for 24k items like bullion, it’s unreliable for testing gold jewelry because some gold alloys contain magnetic metals.

But if you’d like to try the test for fun, just find a strong magnet and hold it next to your item. Gold is not magnetic – so if your object does cling to the magnet, you may either have fake gold or a gold alloy that contains another magnetic metal (such as iron or nickel).

Vinegar Test

Disclaimer: While this test is scientifically interesting, it’s not ideal for most jewelry. Vinegar can damage gold alloys – so unless your piece is pure 24k gold (which is rare for jewelry), there’s a risk of discoloration. Even 14k and 18k pieces, which hold significant value, can be affected. Vinegar testing is best reserved for solid 24k items like bullion or raw gold nuggets.

To perform the test, place your gold item into a small bowl and add a few drops of white vinegar. Pure gold will not react or change color because it’s non-reactive. Fake or low-quality gold, however, may turn black or green.

A Second Opinion

If you try some DIY testing and still aren’t convinced that you have an answer, you could always visit your local jeweler for an appraisal. A professional eye can provide better insight.

A precious metals refinery is another great resource for testing gold. We’ve received our fair share of fake gold at here Garfield Refining – though it’s never the sender’s fault, and we hate to be bearers of bad news!

Whenever you’re buying or selling precious metals like gold, always take the proper precautions to avoid getting scammed. It’s important to vet the dealer you’re working with, and if you’re buying bullion, always make sure there’s a fair buyback policy.

Cash in On Your Gold with Garfield

If you have real gold that you’re looking to sell, sending it to a trusted precious metals refinery like Garfield is your best bet. Unlike most cash-for-gold businesses, we’ll melt and assay your items, giving you the most accurate breakdown of the precious metals they contain. Avoid selling your gold to businesses that lack the necessary equipment to determine its true value, because you may get far less than what your item is worth.

Garfield can extract maximum value from your items, and we’ll pay you based on the current spot price of gold (or silver, platinum and/or palladium). At the time of writing, gold is at record highs – over $4,000 per ounce – so don’t miss your chance to take advantage of the market!

Visit our guide for individual gold sellers to learn how the process works.

Garfield makes selling gold easy. Established in 1892, we have over a century of experience in refining precious metals. We serve various industries, including private individuals, dentists, jewelers, pawnbrokers, and more! Start selling your precious metals today with a free shipping label!