Nickel Three pound bar
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Three pound bar.
Certain of my samples fall in the category of "potential murder weapon" and this is definitely one of them. It's also very silky smooth and a pleasure to hold. The source reports it was made for some kind of electroplating experiment, but it clearly hasn't been corroded in any way.

Here is a picture of quite possibly the only five-year-old in history who has ever jumped over a bar of solid nickel being supported by two magnesium rods:


Source: eBay seller kingendymion
Contributor: Theodore Gray
Acquired: 22 November, 2002
Price: $30
Size: 18"
Purity: >90%
Nickel