Native Sulfur, El Desierto Mine.  
This is a lovely encrustation of naturally occurring sulfur from the El Desierto mine in Bolivia.  The picture does not do it justice. 
Source: Larry Curtis 
Contributor: Theodore Gray 
Acquired: 10 June, 2003 
Price: $2.50 
Size: 2" 
Composition: S
 |  
  |  
 |  
  |