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        Summary 
        
         
          
           | DescriptionSpiegeleisen.jpg | 
           
             Français :  Ferromanganèse de type Spiegeleisen. Pas de provenance précisée. Collection des mineraux du Bringham Young University Department of Geology, Provo, Utah. Photographie de Andrew Silver. Pas d'indice BYU. 
            English:  Spiegeleisen type of  Ferromanganese. No locality given. Mineral collection of Bringham Young University Department of Geology, Provo, Utah. Photograph by Andrew Silver. No BYU index. 
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           | Date | 
           
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           | Source | 
            United States Geological Survey | 
          
          
           | Author | 
           Andrew Silver | 
          
         
         
        Licensing 
        
         
          | Public domainPublic domainfalsefalse | 
         
        
        
         
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          This image is in the  public domain because it contains materials that originally came from the  United States Geological Survey, an agency of the  United States Department of the Interior. For more information, see  the official USGS copyright policy. 
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