Rio Silver drills 0.7 m of 6.26 g/t Au at Maria Norte

Executive Summary

• Rio Silver Inc. reports high-grade silver verification sampling results from its Maria Norte project in Peru, confirming significant silver intercepts up to 991 g/t Ag over 0.70 metres.
• The company outlines a clear near-term development path, leveraging favorable metallurgy, proximity to existing infrastructure, and established community relations to advance toward staged underground development.
• Management highlights the project's strategic position in a prolific silver district, with next steps focused on development planning, geological expansion, and parallel metallurgical work at the Santa Rita property.

Key Details

• Verification Sampling Results (James A. McCrea, PGeo):
  • 991 g/t silver from a 0.7-metre surface vein channel sample.
  • 869 g/t silver (with associated lead and zinc) from a 0.5-metre surface vein channel sample.
  • 396 g/t silver from a historic waste dump grab sample.
  • Total of four samples collected: three chip samples from surface vein outcrops (widths 0.4m to 0.7m) and one grab sample from a historic waste dump.
• Technical Analysis:
  • Samples analyzed by Certimin S.A. (ISO 9001-certified) in Lima, Peru.
  • No additional quality control samples (blanks, standards, or duplicates) were inserted due to the limited sample count appropriate for the exploration stage.
  • The Qualified Person concluded sampling methods and analytical procedures are adequate and results are representative.
• Project Geology and Setting:
  • Located in the Miocene polymetallic belt of central Peru, known for structurally controlled epithermal vein systems.
  • Mineralization occurs in quartz-sulphide veins and breccias, hosting silver-dominant mineralization with associated lead, zinc, and local gold.
  • Mapping indicates a well-defined vein corridor with favorable geometry for continuity along strike and at depth.
• Infrastructure and Metallurgy:
  • Historic testwork indicates mineralization responds to conventional flotation methods.
  • Operating processing facilities are located approximately 11 kilometres from the project.
  • Proximity to existing mills is expected to lower upfront capital requirements, shorten development timelines, and reduce environmental costs.
• Development Strategy and Next Steps:
  • Strategy focuses on staged development of accessible high-grade mineralization while continuing exploration.
  • Immediate activities include site preparation, infrastructure assessments, and permitting work for staged underground access.
  • Continued detailed mapping, channel sampling, and geophysical surveys to refine targets.
  • Parallel metallurgical testwork advancing at the Santa Rita property.
  • Ongoing community and stakeholder engagement to finalize access agreements.
• Regulatory Filing:
  • Independent NI 43-101 technical report by James McCrea, PGeo, filed on SEDAR+ on Dec. 16, 2025.
  • Jeffrey Reeder, PGeo, is the Qualified Person who reviewed and approved the technical information.

Notable Quotes

• "The confirmation of high-grade silver at Maria Norte reinforces what initially attracted us to this project... These are good grades in a district known for long-life silver production, and as our team continues work on the ground, we are seeing encouraging geological indications that suggest the system may extend beyond what is currently exposed." — Chris Verrico, President and CEO