  Baryte.  
Description from the source: 
Baryte (Ba SO4 orth.), Miraflores Mine, Huanuco, Peru. Small but gem crystals, very nice. 0,8x0,8x0,2 cm; 10 g with box. 
Source: Simone Citon 
Contributor: John Gray 
Acquired: 30 September, 2008 
Text Updated: 1 October, 2008 
Price: Trade 
Size: 0.3" 
Composition: BaSO4
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