  Bromargyrite.  
Description from the source: 
Bromargyrite var. Iodobromite ( Ag (I Br) cub.), Schoene Aussicht Mine, Dernbach, Germany. Little, definited yellow crystals on limonitic matrix. Very rare. 1,6x1x1 cm (crystals < 1 mm); 2 g. 
Source: Simone Citon 
Contributor: John Gray 
Acquired: 30 September, 2008 
Text Updated: 1 October, 2008 
Price: Trade 
Size: 0.04" 
Composition: Ag(IBr)
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