5. Inventories (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Inventories	$ 650,213	$ 626,244
Antimony Oxide
Inventories	67,377	204,550
Antimony Metal
Inventories	268,100	5,654
Antimony Ore
Inventories	95,880	151,841
Antimony
Inventories	431,357	362,045
Zeolite
Inventories	$ 218,856	$ 264,199