3. Inventories

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories at March 31, 2017 and December 31, 2016 consisted primarily of finished antimony products, antimony metal, antimony ore, and finished zeolite products that are stated at the lower of first-in, first-out cost or estimated net realizable value. Finished antimony products, antimony metal and finished zeolite products costs include raw materials, direct labor and processing facility overhead costs and freight. Inventory at March 31, 2017 and December 31, 2016, is as follows:

	March 31,		December 31,
	2017		2016
Antimony Metal	$	235,741	$	112,300
Antimony Oxide		252,553		326,126
Antimony Concentrates		28,317		30,815
Antimony Ore		172,347		181,815
Total antimony		688,958		651,056
Zeolite		222,065		204,581
	$	911,023	$	855,637