Arc melted button. 
I've been experimenting very a very crude arc melting furnace made from a box of firebrick, an old 275A stick welder, two graphite electrodes, and a small graphite crucible.  I melted this button of solid nickel down out of a small pile of the nickel balls described above.  Not bad for a $15 furnace (not counting the welder). 
Source: Theodore Gray 
Contributor: Theodore Gray 
Acquired: 23 August, 2003 
Price: $5/pound 
Size: 3/4" 
Purity: 99.9%
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