5. Inventories

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Inventories

The major components of the Company's inventories at December 31, 2020 and 2019 were as follows:

	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

At December 31, 2020 and 2019, antimony metal consisted principally of recast metal from antimony-based compounds, and metal purchased from foreign suppliers. Antimony oxide inventory consisted of finished product oxide held at the Company's plant. Antimony concentrates and ore were held primarily at sites in Mexico and are essentially raw material. At December 31, 2020 and 2019, the antimony oxide and concentrates inventory in Mexico were valued at estimated net realizable value resulting in write-downs of $13,137 and $16,396, respectively. The Company's zeolite inventory consists of salable zeolite material.