Niobium More tiny cylinders
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More tiny cylinders.
What is it with niobium and tiny cylinders? Somewhere there must be a company flooding the world with tiny cylinders of niobium, because people keep offering them to me.

Click the source link for an interesting story about where this sample came from.
Source: Tryggvi Emilsson and Timothy Brumleve
Contributor: Tryggvi Emilsson and Timothy Brumleve
Acquired: 6 September, 2002
Price: Donated
Size: 0.2"
Purity: 99.9%