As the value of rare coins increases, so does the prevalence of counterfeits. Whether you are buying at a flea market or online, knowing how to spot a fake antique coin is an essential skill for any collector.
1. The Weight and Size Test
Authentic coins were struck to exact specifications. A fake coin, often cast from different base metals, will almost always weigh slightly too much or too little. Use a digital pocket scale to compare the coin's weight against historical records.
2. Examine the Edges
Counterfeiters often focus on the face of the coin and neglect the edges. Look for a "seam" running along the edge, which is a telltale sign of a cast fake (made by pouring metal into a mold rather than striking it).
3. Check the Details under a Loupe
Use a magnifying loupe to inspect the fine details. Genuine struck coins have sharp, crisp lettering and clear features. Fakes often look mushy, have uneven surfaces, or feature tiny pimple-like bumps (caused by air bubbles during casting).
4. The Magnetic Test
Many counterfeit silver or gold coins are made using steel or iron cores. Run a strong neodymium magnet over the coin. If it sticks, and it is supposed to be silver or gold, it is undoubtedly fake.
Get Expert Authentication
If a deal seems too good to be true, it probably is. At M.K. Pokkisham, every coin we buy and sell undergoes rigorous authentication. Buy with confidence from our verified inventory.