United States Antimony Corporation (USAC) NYSE (uamy) is a rapidly growing natural resource company that is increasing its raw material supply of antimony from properties in Mexico and third parties around the world. USAC has produced various antimony products since 1969 and is a fully integrated mining, transportation, milling, smelting, and selling company.  USAC operates the only significant antimony smelter in the United States and it is in a "sold out" condition. The Company has proven experience in underground and open pit mining, flotation and gravimetric milling, crushing and screening, dry grinding, cyanide leaching, precious metal refining, pyro-metallurgy, and marketing.

Operations include a smelter and a precious metal refinery in Montana, and a smelter and three mills in Mexico. Three Mexican properties supply direct shipping ore (DSO) or mill feed for the Mexican operations. The Los Juarez property and mill at Puerto Blanco are being permitted to start gold and silver production that will supplement the antimony values and identify the Company as a "precious metal producer." 

USAC owns 100% of the Bear River Zeolite, Corp. mine in southeast Idaho that management  regards as one of the best zeolite properties in the world due to its high cation exchange capacity, low sodium content, hardness,  uniformity, high potassium content, large surface area, and low clay and impurity content.

  • USAC Corporate Offices and Plant,Thompson Falls, Montana
  • Madero Smelter, Coahuila, Mexico
  • Puerto Blanco Flotation/Gravity Mill, Guanajuato, Mexico
  • Antimony Oxide Ore Gravity Mill, Wadley, San Luis Potosi, Mexico
  • Mining - Los Juarez Property, Queretaro, Mexico
  • Mining - Soyatal District, Queretaro, Mexico
  • Mining - Sierra Guadalupe, Zacetecas, Mexico
  • Mining - Guadalupana, Queretaro, Mexico
  • Bear River Zeolite Pit, Preston, Idaho
  • Bear River Zeolite Plant, Preston, Idaho
USAC Corporate Offices and Plant,Thompson Falls, Montana1 Madero Smelter, Coahuila, Mexico2 Puerto Blanco Flotation/Gravity Mill, Guanajuato, Mexico3 Antimony Oxide Ore Gravity Mill, Wadley, San Luis Potosi, Mexico4 Mining - Los Juarez Property, Queretaro, Mexico5 Mining - Soyatal District, Queretaro, Mexico6 Mining - Sierra Guadalupe, Zacetecas, Mexico7 Mining - Guadalupana, Queretaro, Mexico8 Bear River Zeolite Pit, Preston, Idaho9 Bear River Zeolite Plant, Preston, Idaho10

SALES estimates for
April 2018


Antimony pounds


Zeolite short tons



Commodity prices :



May, 2018

Antimony metal






May 11, 2018. Thompson Falls, Montana.  United States Antimony Corporation

(“USAC”, NYSE American “UAMY”) will host an investor call at 4:15 P. M. EDT
on May 16, 2018
to review the 2018 first quarter 10Q financials.

Conference Title:  United States Antimony Corp.
Conference ID:  5200523

Dial In Information:
Toll free: 1-866-531-8880
International:  1-719-325-2499

 Remote Replay available for 7 days:

Conference ID/Passcode:  5200523
Toll free:  1-888-203-1112
International:  1-719-457-0820

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May 7, 2018. Thompson Falls, Montana. United States Antimony Corporation (“USAC”, NYSE American “UAMY”) reported progress on the construction of the  leach plant for the Los Juarez gold-silver-antimony deposit in Queretaro, Mexico. The excavation and lining of the tailings pond is the largest and most expensive project, and it is underway. The concrete floor of the leach plant is being poured and initially no building will be necessary over the floor. Much of the equipment is being assembled in Montana and also in Mexico. Testing and shake-down of the plant is anticipated in Q4 2018.

Tailings pond construction

BRZ zeolite sales for most applications were up again in April.

CEO John Lawrence said “After years of waiting on cyanide permit, we are excited about the construction of the leach plant and imminent production of gold and silver. For years many shareholders considered the Los Juarez property as USAC’s “crown jewel”, and the belief was slowly abandoned due to the metallurgical work and the permit delays. We expect to announce our progress on several additional strategic and financial opportunities that do not involve dilution of any kind.

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