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Highlights
- Resolution Minerals has reported exceptionally high-grade antimony and silver results from rock sampling at the Antimony Ridge Mine in Idaho.
- Assay results returned antimony grades ranging from 31.7% to 48.7% Sb, confirming the presence of very high-grade mineralisation.
- The highest-grade sample recorded 48.7% antimony and 270 g/t silver, while another returned 890 g/t silver alongside 37.9% antimony.
- The results extend prior rock chip and soil sampling that outlined a wide antimony-gold-silver mineralised footprint.
- Resolution has gathered roughly 100 kilograms of representative stibnite material for ongoing metallurgical test work.
- RML shares up 12.5% in early trade on 14 January 2026.
Resolution Minerals Limited (ASX:RML) (OTCQB:RLMF) has announced excellent high-grade assay results for antimony, gold and silver from a recent rock sampling project at the historic Antimony Ridge Mine. The mine is part of the company’s Horse Heaven Project in Idaho, USA. The results further highlight the project’s potential as a strategically significant U.S.-based antimony project.
Exceptional Surface Grades Confirm Mineralisation
The newly reported assays confirm the presence of widespread and exceptionally high-grade antimony mineralisation at Antimony Ridge. Five massive stibnite samples collected from historical open pits and trenches in October 2025 returned antimony grades ranging from 31.7% to 48.7% Sb, alongside encouraging silver and gold values.
- Sample 732005: 48.7% Sb, 270 g/t Ag and 0.69 g/t Au;
- Sample 732006: 35.5% Sb, 223 g/t Ag and 1.07 g/t Au;
- Sample 732007: 42.0% Sb, 200 g/t Ag and 0.85 g/t Au;
- Sample 732008: 37.9% Sb, 890 g/t Ag and 0.81 g/t Au; and
- Sample 732009: 31.7% Sb, 567 g/t Ag and 1.19 g/t Au
Notable peak results included grab sample 732005, which returned 48.7% antimony and 270 g/t silver, and grab sample 732008, which delivered 37.9% antimony and an exceptional 890 g/t silver. These results highlight Antimony Ridge’s potential as a high-grade polymetallic system.
Consistent High-Grade Results Across Samples
All five samples reported consistently higher grades, averaging 39.2% Sb and 430 g/t Ag. The consistency and scale of these findings support earlier rock chip and soil sampling results from September 2025, which identified a wide area of antimony-gold-silver mineralisation.
Metallurgical Test Work Underway
As part of ongoing evaluation, Resolution Minerals has collected approximately 100 kilograms of representative high-grade stibnite-silica vein material from the historical mine. The bulk samples have been transported to Kingston Process Metallurgy Inc. in Canada and Independent Metallurgical Operations Pty Ltd in Australia for initial metallurgical test work and mineralisation characterisation.
Ongoing Exploration and Next Steps
Assay results are pending from the final diamond core and reverse circulation drill holes that were finished during the 2025 drilling season at the Golden Gate Target.
Resolution Minerals continues to advance Antimony Ridge and the broader Horse Heaven Project through a staged work program aimed at progressing permitting, enabling drilling and bulk sampling, and delivering metallurgical outcomes to support future development pathways. Furthermore, the company intends to progress further drilling at the Gold Gate prospect.
RML Shares Rally
RML shares were trading 12.5% higher at AUD 0.063 per share at the time of writing on 14 January 2026.
