5. Inventories

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories at June 30, 2018 and December 31, 2017 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 June 30, 2018 and December 31, 2017 is as follows:

	June 30,		December 31,
	2018		2017
Sodium antimonate	$	56,091	$	-
Antimony oxide		225,099		408,217
Antimony with precious metal content		23,474		35,554
Antimony ore		165,280		187,133
Total antimony		469,944		630,904
Zeolite		242,752		283,805
	$	712,696	$	914,709