 THOMPSON FALLS, MT ACCESSWIRE May 3, 2021 Thompson Falls, MT NYSE American:UAMY US Antimony and Perpetua Resources formerly Midas Gold have signed a Collaboration Agreement to study the feasibility of processing Perpetua Resources antimony concentrates at facilities owned by US Antimony. Perpetua Resources is in the process of permitting a major antimony and gold resource in the state of Idaho at their Stibnite Gold project. 