  Old copper powder. 
This high-purity copper powder is at least 20 years old, or so says Ethan.  The color is characteristic of copper minus its metallic sheen (due to the fineness of the powder, not oxidation). 
Source: Ethan Currens 
Contributor: Theodore Gray 
Acquired: 9 February, 2009 
Text Updated: 8 February, 2009 
Price: Trade 
Size: 1" 
Purity: 99.999%
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