ANTIMONY, GOLD & SILVER PROJECTS

Idaho and Washington, USA

Pinnacle Minerals executed in October 2025 a binding agreement to acquire eight Antimony, Gold and Silver projects in two highly prospective and well-established mining regions in the USA. A total of 8 claims have been secured, with six in Idaho and two in Washington, located near historic mining districts with proven production history.

Idaho

    • With the acquisition of Idaho Antimony Corp, Pinnacle now controls a total of 208 USFS claims (16.87 km2 license area) in Idaho, covering and surrounding historic antimony & gold mines and workings
    • Projects are located between Perpetua Resources’ (Mkt Cap AUD $4.24bn) Stibnite Mine and Resolution Minerals’ (Mkt Cap A$80m) Horse Heaven Project
    • Located within a similar structural corridor and share similar geological characteristics to Stibnite, including host rocks, alteration, and “roof pendant” mineralisation style
      • Positioned within the same structural corridor, with high potential for new antimony-gold systems

    Thunder Mountain Gold Project

    The Lightning Peak open pit (Inside Pinnacle’s Thunder Mountain Gold Project

      • Significant potential for mine restart and resource expansion
      • A field campaign was completed in the spring of 2025 that confirmed presence of historic workings and mineralization across project area and supports planned geological and environmental assessments
      • Historic production district with multiple past-producing mines
      • Produced over 100,000 oz Au between 1986–19921

    Lightning Peak

      • Includes the Lightning Peak open pit (former Coeur d’Alene operation)2
        • In 1989, the mine produced 17,315 oz of gold and 22,744 oz of silver from 583,751 tons of ore
        • In 1990, mining focused entirely on Lightning Peak, yielding an estimated 25,000 oz of gold and 30,000 oz of silver
          • The proposed pit was projected to produce around 1 million tons of ore, with an estimated reserve of 70,000 oz of gold

      1. Historical public records of the Idaho Geological Survey www.idahogeology/pub/Digital_Databases
      2. Historical productions based on Idaho Bureau of Mines/USGS report: https://www.idahogeology.org/Uploads/Data/MineDocs/CH0069_027.pdf – pp 38

      Smith Creek Antimony Project

        • Smith Creek covers a 2.1 km² license area, close to infrastructure and skilled labour
        • Northernmost Idaho target with historic antimony occurrences
        • Structural contact zones between gneiss and phyllite enhance potential

      Routson Antimony Project

        • Contains historic Green Spider and Routson prospects.
        • Adjacent to Big Creek Airstrip
        • Hosts marble and calc-silicate metasiltites with metamorphosed volcanic sequences

      Silver Cliff Lode Antimony Project

        • 1 km² license area located approx.14 km west of Perpetua and 6 km south of Yellow Pine
        • Historic samples up to 4.2% Sb
        • Hosted in muscovite-biotite granite to granodiorite

      Big Creek Antimony Project

        • Geological analogue to Perpetua’s Stibnite Gold Project
        • Roof Pendants Present
        • Strong potential for antimony-gold mineralization in similar structural setting

      Washington

        • Pinnacle Minerals Washington state projects are located in North-central Okanogan County and the Cascade Range area
        • The region has a history of Antimony, Gold and Silver production

      Antimony Queen Project

        • The project area is 1,235 acres (~5 km²) in Okanogan County approximately 1 hour from the town of Wenatchee
        • A 2025 LiDAR analysis confirmed historic adits and mine workings
        • The project has seen historic production since 1906
        • Has produced about 1,000 tons stibnite ore &  several hundred tons antimony oxide3

      3. Historical productions based on : CES, 2004 Site inspection, Antimony Queen Mine: Unpublished USFS report, Contract #10181-1-D007, 20 p. plus tables, figures and appendices.

      Justice Mine Antimony Project

        • The Justice Mine Project covers 63 acres (0.25 km²) in the Monte Cristo district, where mining was conducted between 1889 and 1907
        • Two main areas of focus are the historic Justice and Golden Cord mines 
        • Combined production is approx 34,000 tons4
        • Project is just 78 miles from Seattle, in an area replete with infrastructure, power and proximate to skilled labour.