Non-crystalline powder. 
This is silver that feels too light to be silver.  It's a very unusual type of powder, light and almost fluffy, Greg is kindly helping me flesh out some elements with different and unusual forms, like wires, meshes, wools, foils, etc: This non-crystalline powder is probably the most peculiar thing he's sent.  He also sells lots of other unusual elements on eBay: Check the source link for more information. 
Source: Greg P 
Contributor: Greg P 
Acquired: 18 April, 2003 
Price: Donated 
Size: 1" 
Purity: 99.99% 
Sample Group: Powders
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