  Crystal ribbon.
This stunning strip of electrolytic niobium crystals is one of only a small bag left in all the world. The process used to create them is no longer used because a more economical method of producing ultra-high-purity niobium has been developed. A few of these are being offered on eBay by Kaistar R&D: Click the source link below if you want to get one. I am not aware of any other source of niobium crystals in any form.
I chose this sample to represent its element in my Photographic Periodic Table Poster. The sample photograph includes text exactly as it appears in the poster, which you are encouraged to buy a copy of.
Source: Kaistar R&D
Contributor: Kaistar R&D
Acquired: 6 August, 2004
Text Updated: 4 May, 2007
Price: Donated
Size: 2"
Purity: >99.995%
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