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          Name:  | 
      
          cylindrite  | 
      
          
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          Class:  | 
      
          Sulfides  | 
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          Chemistry:  | 
      
          Pb3Sn4Sb2S12 mixed lead-tin-antimony sulfide  |  
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          Color(s):  | 
      
          gray, blackish-gray, metallic luster  | 
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          Hardness:  | 
      
          2.5  | 
      
          SpecGrav:  | 
      
          5.4  | 
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          Fracture:  | 
      
          conchoidal  | 
      
          Cleavage:  | 
      
          none  | 
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          Crystal:  | 
      
          Uncertain (crystals often in the form of small tubes)  | 
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          Envronment:  | 
      
          In tin deposits and ores  | 
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          Association:  | 
      
          cassiterite, franckeite, teallite  | 
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          Locals:  | 
      
          | Bolivia | Ukraine |  | 
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          Misc:  | 
      
          From the Greek word, kylindros, "cylinder."  | 
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