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Details Silver is not magnetic. However it is 'diamagnetic' - a sliding magnet sets up an 'electrical field' which you can detect with suitable magnets. These magnets are 'suitable' because of their size and power, read all about it. Sizes: 3 X 1mm, neodymium 7 X 4mm, neodymium 10 X 2mm, neodymium 20 X 5 X 2mm, neodymium 8 X 4mm, iron IMPORTANT Copper reacts the same way as silver (though the effect isn't as strong), so this test will not tell you if you have a copper coin plated with silver. YOU STILL NEED A SILVER TESTER to be certain.
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