United States Antimony Corporation Announces Contract Completion on International Shipments of Antimony, and Restart of Madero, Coahuila Mexico Smelter December 20, 2024 / Gambusino Prospector 2024-12-20 US Antimony, Smelter. United States Antimony Corporation Announces Contract Completion on International Shipments of Antimony, Restart of Madero, Coahuila Mexico SmelterDownload Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like this:Like Loading...