  Highly Ordered Pyrolytic Graphite. 
HOPG (Highly Ordered Pyrolytic Graphite) is a particularly pure, crystal-like form of graphite with very smooth hexagonal sheets of carbon atoms. 
Source: Ethan Currens 
Contributor: Theodore Gray 
Acquired: 24 March, 2009 
Text Updated: 24 March, 2009 
Price: Anonymous 
Size: 1" 
Purity: 99.99%
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