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          Name:  | 
      
          bastnasite (bastnaesite)  | 
      
          
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          Class:  | 
      
          Carbonates  | 
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          Chemistry:  | 
      
          Y (CO3) F  |  
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          Color(s):  | 
      
          yellow, yellow-brown, reddish-brown streak: white  | 
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          Hardness:  | 
      
          4.0 - 4.5  | 
      
          SpecGrav:  | 
      
          4.9 - 5.0  | 
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          Fracture:  | 
      
          Cleavage:  | 
      
          imperfect  | 
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          Crystal:  | 
      
          hexagonal - often prismatic  | 
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          Envronment:  | 
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          Association:  | 
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          Locals:  | 
      
          | N.M., USA | Sweden |  | 
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          Misc:  | 
      
          Named as the Y end member from the Bastnas Mine, Riddarhyttan, Vastmanland, Sweden. There are three minerals that make up the group Y, Ce, and La.  | 
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