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5. Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Inventories
    2020     2019  
Antimony Oxide   $ 67,377     $ 204,550  
Antimony Metal     268,100       5,654  
Antimony Ore     95,880       151,841  
     Total antimony     431,357       362,045  
Zeolite     218,856       264,199  
    $ 650,213     $ 626,244