  Arc-melted magnetic alloy. 
Description supplied by the source: 
This is another arc-melted button of a particular alloy of iron-cobalt slated to be used for magnetism research. I chose to send you this particular sample because of the beautiful surface and crystal grains visible. 
Source: Ethan Currens 
Contributor: Ethan Currens 
Acquired: 21 March, 2008 
Text Updated: 30 April, 2008 
Price: Anonymous 
Size: 1.5" 
Composition: FeCo
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