Carbon Diamond powder
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Diamond powder.
Looks kind of like graphite powder, doesn't it? This is very fine (0-1/4 micron) diamond powder intended to be used as an abrasive, and it really looks nothing like a bunch of tiny diamonds.
Source: eBay seller reginaldvance
Contributor: Theodore Gray
Acquired: 1 September, 2003
Price: $50
Size: 1"
Purity: >99%
Sample Group: Powders