My periodic table poster is now available! 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%