Why Counterfeit Gold Coins Exist

Gold's enduring value makes it a target for counterfeiters. While the vast majority of gold coins sold through reputable dealers are genuine, knowing how to spot a fake is an essential skill for any serious collector or investor. Whether you're buying Perth Mint coins, 1 oz gold coins, or other bullion, these tests will help you buy with confidence.

1. Check the Weight and Dimensions

Every genuine gold coin has precise, published specifications for weight, diameter, and thickness. For example, a 1 oz Gold Maple Leaf weighs exactly 31.1 grams with a diameter of 30 mm. Use a precision digital scale (accurate to 0.01g) and a calliper to verify these measurements. Even a small discrepancy is a red flag.

2. The Ping Test (Ring Test)

Gold has a distinctive, long-lasting ring when struck. Hold the coin loosely between two fingers and tap it gently with another coin or a pencil. A genuine gold coin produces a clear, high-pitched ring that sustains for a second or two. Base metals like tungsten or lead produce a dull, flat thud. There are even free smartphone apps (such as "Bullion Test") that use your phone's microphone to analyse the sound frequency.

3. Use a Magnet

Gold is not magnetic. Hold a strong neodymium magnet near the coin — if it attracts or sticks, the coin is not pure gold. However, this test alone isn't foolproof: some counterfeit metals (like tungsten) are also non-magnetic, so always combine this with other tests.

4. The Acid Test

Gold testing acid kits are available at most jewellery supply stores. A small scratch on an inconspicuous edge of the coin is rubbed onto a testing stone, and acid is applied. The reaction (or lack thereof) indicates the metal's purity. This is a reliable test but does leave a minor mark, so it's best used on coins you already own rather than ones you're considering purchasing.

5. Check for an Assay Card or Certificate

Many investment-grade coins — particularly from mints like the Perth Mint, Royal Canadian Mint, PAMP Suisse — come sealed in tamper-evident assay cards with a certificate of authenticity. If the packaging appears opened, resealed, or damaged, treat it with caution. Never buy a coin that was supposed to come in an assay card but doesn't.

6. Examine the Details Under Magnification

Use a jeweller's loupe (10x magnification) to inspect the coin's fine details — lettering, relief, edge reeding, and surface finish. Genuine coins from major mints have razor-sharp, consistent detail. Counterfeits often show blurry text, uneven reeding, pitting, or a grainy surface texture.

7. The Specific Gravity Test

Gold has a very high density (19.3 g/cm³) — much higher than most metals used in counterfeits. You can calculate a coin's specific gravity by weighing it dry, then weighing it submerged in water. Dividing the dry weight by the difference gives you the specific gravity. A result close to 19.3 confirms gold; tungsten (a common counterfeit material) comes in at 19.25, making this test less reliable for tungsten-core fakes.

8. Buy from Reputable Dealers

The single most effective way to avoid counterfeit gold coins is to buy from established, reputable dealers. At Gold Hub, every coin we sell is sourced directly from authorized distributors and major mints. Our 1 oz gold coins and Perth Mint products come with full provenance and, where applicable, original mint packaging.

What to Do If You Suspect a Fake

If you believe you've received a counterfeit coin, do not attempt to spend or sell it — that could be illegal. Contact the dealer immediately and, if necessary, report it to the Royal Canadian Mint or local authorities. Reputable dealers will always stand behind the authenticity of what they sell.

Shop with Confidence at Gold Hub

Every coin in our collection is authentic, sourced from the world's most trusted mints and refineries. Browse our selection of gold coins and Perth Mint products and buy with complete peace of mind.