We have chosen three small but very powerful (neodymium) magnets. I say the magnets are ‘suitable’ because if a magnet is too heavy it won’t work and if it is too weak it won’t work. We supply three suitable magnets so that you can test any size of coin. The QUICKTEST ‘magnet tester' for silver. Many coins contain nickel and are most definitely magnetic, the magnet will 'stick' to the coin. If a suitable magnet shows the diamagnetic effect the item might be silver (most likely with a coin) or it could be silver-plating on copper.ĭo not confuse diamagnetism with magnetism. So if a magnet 'sticks' to the item, it cannot be silver or copper. Most silver plated items are made of silver-on-copper. Copper is also diamagnetic (though not as strongly as silver). You need to tilt the item so that the magnet slides down, you cannot do this on curved or lumpy surfaces. trays, boxes, plates and trays, even knives and forks. The diamagnetic test is good not only for coins but for any items with a flat (and reasonably smooth) surfaces, e.g. Now try it with a non-magnetic coin (most coins), the magnet, predictably, just ‘falls off’ the coin. This is because the moving magnet sets up an ‘electrical field’* that slows its fall. If you hold a silver coin at 45 degrees a suitable magnet will slide down it slowly. Silver is not magnetic, not even with the strongest magnet. OTHER EVERYDAY (SERIOUS) USES FOR MAGNETS BUY NOW: CLICK ON THE PICTURE (all magnets) CONTENTS
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