Tungsten aka Wolfram is paramagnetic so it is weakly attracted to magnets.
A guy devised the following to test for Tungsten in gold bars:
http://www.youtube.com/watch?v=foELQ7T8_90
But he is using a paperclip and not real Tungsten.
Question: How strong a magnet do I need in order to achieve a significant attraction to Tungsten. By significant I mean that it should exert a force of several (1/100)*grams so that it can be measured with a scale as in the YouTube video. Will a Neodymium magnet do? If yes, what should be the strength of the magnet in kg?
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