Molten blobs under argon. 
Ampouling potassium in a clean and dry enough environment to keep it shiny is quite difficult: It is an extremely reactive metal to say the least.  This sample demonstrates great skill in its ampouling, especially since it was done using only  "the simplest methods", according to the source. 
Source: Frank Liebscher 
Contributor: Frank Liebscher 
Acquired: 28 January, 2004 
Price: Donated 
Size: 3" 
Purity: 99.9%
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