  Raw tungsten carbide pellet.
This is a pellet of sintered tungsten carbide (with cobalt as the binder). I made it myself using a graphite mold (listed under carbon) and an acetylene torch. Check out the neighboring sample to see what I did with it.
You can read more in my Popular Science column on the topic.
Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 1 December, 2008
Text Updated: 2 December, 2008
Price: $1
Size: 0.5"
Purity: >60%
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