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Silver coins are popular among investors, but unfortunately, counterfeits do exist. In this article, you will learn how to verify the authenticity of your silver coin using simple methods such as weighing, sound, dimensions, color, and magnetism.
At Holland Gold, we primarily sell 100% silver investment coins minted by recognized mints from around the world. These coins meet all international quality standards and are carefully inspected for authenticity. The information in this article therefore focuses on these 100% silver investment coins.
We also sell historic Dutch coins such as guilders and rijksdaalders, which contain 72% silver. These can often be tested easily with a magnet, as later versions were made of nickel. Other methods, such as testing density, weighing, and sound, are also suitable.
Use a precise, calibrated scale. The coin’s weight should match the official specification. For 1 troy ounce coins, a slight positive deviation is normal, especially for coins sold in sealed packaging.
Silver is not magnetic, but it reacts slowly to a falling magnet. On a genuine silver coin, the magnet will glide slowly across the surface. If the magnet sticks or moves too quickly, the coin likely contains another metal.
Check whether the dimensions and weight match the official specifications. Use the formula:
P = M / V
where P is the density, M the mass (in grams), and V the volume (in cm³).
The specific gravity of silver is 10.49 g/cm³. Cheaper metals such as copper (8.9), tin (7.3), and zinc (7.1) have lower densities. A counterfeit coin with a different core will therefore appear larger at the same weight — a clear sign of imitation.
Tap the silver coin gently with another coin or a metal rod. Genuine silver coins produce a clear, ringing tone that lasts a few seconds. A dull or short sound may indicate that the coin is made from another metal.
Many mints, such as the Perth Mint (Australia), include micro-engraved security elements. The Australian Kangaroo, for example, features a laser-engraved letter “A”, visible only under magnification. Always check whether your coin has these features or examine the fine detailing, as with the Silver Philharmonic.
Place an ice cube on the coin. Silver conducts heat extremely well, so the ice will melt quickly. Note: this test may cause minor oxidation. Use it carefully with collectible or valuable coins.
Testing silver coins yourself can be challenging. At Holland Gold, we are happy to assist you in verifying your precious metals. When collecting your coins or bars, we can perform an authenticity test together using our professional testing equipment.
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