  Tiny crystal. 
This is a small chip from a small bag of tellurium crystals I received from Oliver Sacks on a visit.  I used it to test my very small turntable, constructed to allow accurate rotation of samples down to a couple of mm in size. 
Source: Oliver Sacks 
Contributor: Oliver Sacks 
Acquired: 4 August, 2004 
Price: Donated 
Size: 0.1" 
Purity: 99.9%
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