Massive electrowinning plate. 
This is a huge, heavy slab of electrolytically deposited nickel from a scrap yard in southern California.  Lovely, lovely surface! 
Source: John Wechselberger 
Contributor: Theodore Gray 
Acquired: 21 August, 2003 
Price: $20 
Size: 4" 
Purity: 99.9%
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