Zirconium Pellets
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These look like "green" pressed pellets meant to be arc-melted or sintered. They are crumbly as if made of a powder that has been only weakly bonded (e.g. exposed to great pressure but not heated to the point where the particles actually fuse together).
Source: eBay seller nebulousstars
Contributor: Theodore Gray
Acquired: 1 September, 2004
Price: $12
Size: 1"
Purity: 99%