Ferberite - Hoosier Mine, Boulder Co. Tungsten District, Boulder Co., Colorado, USA 
			(gap13) 
			
		
   
		
   Overall Size: 2 x 0,8 cm  
  Specimen weight: 30 gr.  
   Oxides         
  Small bright black Ferberite crystals (0,5 mm) on matrix    
 
  
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