Resolution Minerals Limited (ASX: RML; OTCQB: RLMLF) has delivered a standout result rarely seen in modern exploration: with surface rock samples grading up to 50% antimony, accompanied by exceptional silver grades of up to 890 g/t and gold values reaching 1.19 g/t. Generated from the historic Antimony Ridge mining area within the Company’s Horse Heaven Project in Idaho, the results confirm a high-grade antimony, silver and gold polymetallic system that is unusually well exposed at surface.
Figure 1: Horse Heaven Project location showing the Golden Gate and Antimony Ridge targets, with the Stibnite Project located about 12 kilometres to the east. [Resolution Minerals]
Five samples averaged 39.2% antimony and 430 g/t silver. The standout result, sample 732008, returned 37.9% antimony and 890 g/t silver. These aren’t drill intercepts requiring interpretation. They’re surface samples anyone could see and touch.
Surface Grades Rarely Seen Anywhere
Resolution Minerals collected five rock samples from within historical open pits and trenches at Antimony Ridge Mine in October 2025. The samples were part of a programme to collect approximately 100 kilograms of representative high-grade stibnite material for metallurgical testing.
The results:
- Sample 732005: 48.7% Sb, 270 g/t Ag and 69 g/t Au;
- Sample 732006: 35.5% Sb, 223 g/t Ag and 07 g/t Au;
- Sample 732007: 42.0% Sb, 200 g/t Ag and 85 g/t Au;
- Sample 732008: 37.9% Sb, 890 g/t Ag and 81 g/t Au; and
- Sample 732009: 31.7% Sb, 567 g/t Ag and 19 g/t Au.
Figure 2: Locations of surface rock samples collected at Antimony Ridge during the September and October–November 2025 programs. [Resolution Minerals]
Silver grades ranged from 200 g/t to 890 g/t. Gold was present in every sample. The material came from massive stibnite veins, the antimony sulphide mineral that was historically mined and shipped by rail.
Why Antimony Matters Now
Antimony has quietly become one of the most strategically important metals on earth. The United States produces none of it domestically. China controls 90% of the global supply and banned exports to the U.S. in December 2024. Antimony is used in defence applications and is currently imported by the United States.
The global antimony market was valued at US$2.17 billion in 2023 and is projected to reach US$3.30 billion by 2030, growing at 6.1% annually. Demand is rising across flame retardants, lead-acid batteries and semiconductors. Asia Pacific dominates consumption. North America needs a supply.
Figure 3: Antimony market size by application, showing projected growth trends through 2030. [Grand View Research]
Antimony’s strategic importance spans defence, technology and energy sectors. It is indispensable in ammunition primers, night vision equipment, flame retardants and battery systems. The metal’s dual role in national security and industrial applications has elevated its status as one of America’s most critical supply chain priorities.
Figure 4: Overview of key industrial applications of antimony across defence, technology, and clean energy sectors.
Metallurgical Testing Now Underway
Resolution Minerals collected approximately 100 kilograms of stibnite material for metallurgical testing. The samples have been submitted to two laboratories: Kingston Process Metallurgy in Ontario, Canada, and Independent Metallurgical Operations in Perth, Western Australia.
Results will be reported to the market as they become available. The metallurgical programme represents a critical step toward understanding processing pathways and potential downstream development options for the Antimony Ridge system.
Golden Gate Drilling Continues
The Company recently completed a diamond drilling programme at the Golden Gate Prospect, located six kilometres from the Stibnite Gold Project. Three reverse circulation holes were drilled to test strike, width and depth extensions of continuous gold mineralisation intersected in maiden diamond core holes.
All three discovery core holes ended in mineralisation, confirming Golden Gate as a large, open intrusion-related gold system. Assay results for the final three diamond core holes and three reverse circulation holes drilled during the 2025 drilling season have been submitted for multi-element analysis. Results are pending and will be reported to the market once available.
Management Comments
Craig Lindsay, CEO of U.S. Operations, commented:
“These results represent a significant validation of the Antimony Ridge Target and further demonstrate the exceptional grade potential of the Horse Heaven Project. Antimony grades of this magnitude are rarely reported globally, particularly exposed at surface, and the consistent association with strong silver and gold values materially enhances the project’s overall value proposition.”
Figure 5: Craig Lindsay, Chief Executive Officer of U.S. Operations at Resolution Minerals. [Resolution Minerals]
He added:
“Importantly, Antimony Ridge is emerging as a large, coherent, high-grade system within a strategically critical jurisdiction at a time when U.S. antimony supply has become a national priority. With metallurgical test work underway and permitting progressing toward drilling and bulk sampling, we believe Horse Heaven is rapidly advancing toward becoming a highly strategic U.S. critical minerals asset.”
Precious Metals Prices Support Exploration
Resolution’s exploration success coincides with surging precious metals prices. As of 14 January 2026, gold and silver trade at:
Gold:
- US$4,620.75 per ounce, up +15.36 (+0.33%) today
- +0.32% over 24 hours
- +38.28% over six months
- +70.92% over one year
- +152.06% over five years
- And an extraordinary +728.13% over 20 years
Figure 6: Gold spot price performance showing recent price movement as of January 2026. [Goldprice]
Silver:
- US$89.81 per ounce, up +4.64 (+5.45%) today
- +5.43% over 24 hours
- +34.27% over 30 days
- +125.37% over six months
- +178.00% over one year
Figure 7: Silver spot price performance showing recent price movement as of January 2026. [Goldprice]
The broader precious metals rally, combined with antimony’s critical mineral status, creates a supportive environment for Horse Heaven’s development.
Investor Outlook
Resolution Minerals Limited (ASX: RML) is advancing two high-grade systems in one of America’s most strategic mineral districts.
Share price activity (as of 14 January 2026):
- Last Price: $0.065 per share
- Market Capitalisation: $113.09 million
- 52-Week Range: $0.007 to $0.150 per share
Figure 8: Resolution Minerals share price performance over the past year. [ASX]
Near-term catalysts include metallurgical test results from Antimony Ridge, assay results from Golden Gate drilling, and permitting approvals to enable drilling at Antimony Ridge. With surface antimony grades approaching 50% and metallurgical testing underway, upcoming results are expected to define the Antimony Ridge system further.
The combination of exceptional surface grades, favourable U.S. policy, and proximity to America’s only permitted antimony project adds further context to the project’s exploration potential. As the U.S. races to secure a domestic critical minerals supply, Horse Heaven stands to benefit from this rapidly evolving market.
