  Lots of lumps. 
This is about a pound of lumps similar to the one I got from David Franco (see above).  Since I know Franco sends only the very purest of samples, and since these look identical to the one he sent, I feel reasonably confident in assigning them a similar purity.  They were obviously created by the same basic process. 
Source: eBay seller snooj 
Contributor: Theodore Gray 
Acquired: 22 August, 2002 
Price: $10 
Size: 0.75" 
Purity: 99.9%
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