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


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May 15, 2019. Thompson Falls, Montana. United States Antimony Corporation (“USAC”, NYSE American “UAMY”) will host an investor call at 4:15 P. M. EDT on Wednesday May 15, 2019 to review the first quarter 2019 10Q.

Conference Title: United States Antimony Corp.

Conference ID: 3861988

Dial In Information:
Toll free: 1-877-260-1479
International: 1-334-323-0522

Remote Replay available for 7 days:
Conference ID/Passcode: 3861988
Toll free: 1-888-203-1112
International: 1 719-457-0820


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May 6, 2019. Thompson Falls, Montana. United States Antimony Corporation (“USAC”, NYSE American “UAMY”) reported a doubling of its Madero, Coahuila, Mexican smelter capacity with the startup of the No. 2 long rotary furnace (LRF). This is expected to double Mexican production by the end of Q2 due to the increased output of the Wadley and Guadalupe Mines. During Q1 of 2019, the Mexican production per month was approximately 69,000 pounds. For future production increases, there are four more LRFs at Madero, and construction has begun on the No. 3 LRF.

No. 2 LRF in production roasting direct shipping ore and having slag removed

No. 2  LRF showing entire installation from left to right, 105 foot stack in background,
dust collector in front of  stack, cooling ducting, and furnace.

The five acre cyanide leach pond at the Puerto Blanco mill for the Los Juarez gold, silver, and antimony mine has been excavated and a culvert has been placed in it to divert storm water from running into the pond. The pond is now ready for the HDPE liner which will be the last major expenditure. The wiring, tailings pipe lines, and screens have been finished.  Testing and startup of the plant is anticipated during Q2 2019.

Five acre tailings pond with culvert is ready for the HDPE liner.

The Puerto Blanco leach plant for the Los Juarez gold and silver is nearing completion.


Estimated production for April 2019 was as follows:



Antimony pounds


Zeolite short tons


Inventories of Mexican antimony mine ore continue to grow. The average Rotterdam price for antimony metal during April 2019 was $7,246.25 per metric ton or $3.287 per pound. Bear River Zeolite sales continue strong.

CEO John Lawrence said “The startup of the No. 2 LRF will liquidate the prepaid inventory of mine ore to help fund the Los Juarez gold, silver and antimony property leach plant and provide operating funds.”


About U.S. Antimony


US Antimony is a growing, vertically-integrated natural resource company that has production and diversified operations in precious metals, zeolite and antimony. 


Forward Looking Statements:

This Press Release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 that are based upon current expectations or beliefs, as well as a number of assumptions about future events, including matters related to the Company's operations, pending contracts and future revenues, ability to execute on its increased production and installation schedules for planned capital expenditures and the size of forecasted deposits. Although the Company believes that the expectations reflected in the forward-looking statements and the assumptions upon which they are based are reasonable, it can give no assurance that such expectations and assumptions will prove to have been correct. The reader is cautioned not to put undue reliance on these forward-looking statements, as these statements are subject to numerous factors and uncertainties. In addition, other factors that could cause actual results to differ materially are discussed in the Company's most recent filings, including Form 10-KSB with the Securities and Exchange Commission.

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