Investor Presentaiton

ORE PROCESSING FLOW SHEET Dore metallurgical recoveries • Gold at 68% 91% (88.9% average) • Silver at 23.2% Average Antimony concentrate metallurgical recoveries 1,2 • Antimony at 84% - 91% (89.5% average) • Gold at 1% - 2% • Silver at 59% -65% High-grade antimony concentrate (Sb 55-65%) Low levels of impurities = no penalties Gold and silver likely by-product payables in Sb concentrates Potential Antimony processing options include • Conventional pyrometallurgical (smelting and roasting) Hydrometallurgical (solvent extraction) Bench and pilot scale testing indicates both options are viable processes for Sb concentrates. reporting LOM averages by ore type 2 excluding historical tailings Crushing, SAG & Ball Milling Oxide High Sb Sulfide Stibnite Flotation Antimony Concentrate Low Sb Sulfide Pyrite Flotation Transitional POX Residuals Gold Leach Electrowinning Dore Based on the 2020 Feasibility Study (FS) which is intended to be read as a whole and sections should not be read or relied upon out of context. The information in this presentation is subject to the assumptions, exclusions and qualifications contained in the FS. See "Regulatory Information" at the end of this presentation. For a summary of differences between the FS and TRS, see "Cautionary Note and Technical Disclosure" at the beginning of this presentation 32

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