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5. Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
    June 30,     December 31,  
    2019     2018  
Antimony Metal   $ -     $ 8,127  
Antimony Oxide     252,128       255,782  
Antimony Concentrates     -       2,214  
Antimony Ore     201,543       257,067  
     Total antimony     453,671       523,190  
Zeolite     270,017       232,071  
    $ 723,688     $ 755,261