  Silver in Bornite.  
Description from the source: 
Silver in Bornite (Ag cub.), San Martin, Zacatecas, Mexico. Silver sheet into the massive Bornite. Typic for the locale. 5x3,5x2,5 cm; 62 g. 
Source: Simone Citon 
Contributor: John Gray 
Acquired: 30 September, 2008 
Text Updated: 1 October, 2008 
Price: Trade 
Size: 2" 
Composition: Ag
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