Bravoite

Bravoite in chalcopyrite
Origin: Gey, Rheinland-Palatinate, Germany
Owner: Lou Perloff
Microscopic image
 
 
 

Photo courtesy of: 

Lou Perloff

Photo-Atlas of Minerals

 

  
When pyrite has enough nickel (> 8%) in it, it becomes gray in colour and used to be called bravoite. The result is crystals with the form of pyrite, but the luster and colour of galena.
Origin: Gilman District, Eagle County, Colorado, U.S.A.
Ex. Ed Ruggiero collection
Sample size: 7.9 x 5.4 x 3.8 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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