  Titanium nitride razor blade.   
The blades from inside a rotary electric shaver.  The gold color is titanium nitride, a hard, abrasion-resistant coating.  See the shaver foil sample also listed under titanium for more about the use of titanium in shaving and other products. 
Source: Walmart 
Contributor: Theodore Gray 
Acquired: 1 December, 2008 
Text Updated: 17 March, 2009 
Price: $30 
Size: 2" 
Purity: <1%
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