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5. Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Inventories
   

March 31,

2020

   

December 31,

2019

 
Antimony Oxide   $ 200,780     $ 204,550  
Antimony Concentrates     -       5,654  
Antimony Ore     151,841       151,841  
     Total antimony     352,621       362,045  
Zeolite     290,272       264,199  
    $ 642,893     $ 626,244