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Boron Nitride ceramic disk.
An example of the element Boron

Sample Image
Boron Boron Nitride ceramic disk
Boron Nitride ceramic disk.
This ceramic-like disk came from a scrap yard and was claimed to be or contain boron. I don't think it's pure boron, but it could well be a boron nitride ceramic. Unfortunately the analytical instruments available to me don't work on low atomic number elements, so I have no good way of testing what it really is.
Source: John Wechselberger
Contributor: John Wechselberger
Acquired: 15 April, 2004
Price: Donated
Size: 4.5"
Purity: <50%
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