[Be sure to see our video on using Ultrasonic Thickness Gauges to accurately determine if a bar is made of real silver]
video shows you how to use the "magnet test" to help determine which
100oz Engelhard silver bar bar is real, and which is fake (made from
Silver is diamagnetic, meaning that a magnet will not
stick to it, but you will feel strong resistance when moving a strong
magnet on the surface of the silver. Although lead is also diamagnetic,
it is much less so, as this video shows.
Note that this test
will likely not detect real silver bars that were hollowed and filled
with lead (the ring test might, however).
The magnet test can
positively determine that a bar is fake, but cannot positively determine
that a bar is real. For a very accurate test, you can use an
ultrasonic thickness gauge (check our our other videos to see one in
action; we were the first to use this technique).