America Sent This Idaho Mine to War. Twice.

The Same Mountain That Supplied Two World Wars Is Back in Play. This Time, the Threat Is Coming From Beijing.

In December 2024, China turned off the tap.

Without notice, Beijing imposed export controls on antimony, the metal inside every artillery shell, every set of night-vision goggles, and every armor-piercing round used by US forces.1

The impact was immediate. Antimony prices shot past $40,000 per ton. The Pentagon rushed to act, committing nearly $1 billion to rebuild stockpiles that had been quietly drawn down for decades.2 Defense officials acknowledged the uncomfortable truth: the United States mines zero antimony domestically and imports 100% of its supply.3

More than 80% of global antimony processing takes place inside China.4

That is not a supply chain inconvenience. It is a national security problem with no quick fix.

Now consider tungsten. No US mine production since 2015. Price up 557% in a single year.5 The Pentagon faces a hard deadline: stop purchasing Chinese tungsten for defense applications by January 1, 2027.6

And gold. Trading above $4,500 per ounce at the time of writing.7 Up more than $1,100 in just twelve months.

Three metals in simultaneous supply crises. Three converging tailwinds for the same kind of project.

In central Idaho, in the same mountain range as the $3.4 billion company that just received the largest EXIM loan in recent agency history,8 sits on a 15,000-acre property that supplied antimony to US troops in World War I, World War II, and the Korean War.

It went dormant for decades. The team behind it believes the timing has come back around.

"China processes 80% of the world’s antimony. They mine 60%. They’ve cut off supplies to the US. The current administration has a very large push on to develop domestic supplies of these critical metals. Antimony and tungsten are very high on that list."
— Craig Lindsay, CEO US Operations, Resolution Minerals Ltd. (ASX:RML) (OTC:RLMLF)9

The Horse Heaven Project. Three Metals. One Property. One Permit Pathway.

The project is called The Horse Heaven Project. It sits in Valley County, Idaho, on the eastern boundary of Perpetua Resources’ fully permitted Stibnite Gold Project.10

That neighbour, Perpetua Resources (NASDAQ:PPTA), carries a market cap of approximately US$2.71 billion. Just this past month, it received a US$2.9 billion loan from the US Export-Import Bank, the largest under the Make More in America initiative, to build what Washington calls the country’s only identified domestic reserve of antimony.11

Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) owns 100% of Horse Heaven. The property covers 14,580 acres across 729 federal lode mining claims.12 The geology is described as virtually identical to Stibnite: same intrusion-related gold-antimony system, same district, same range.

The market cap of Resolution Minerals (ASX:RML) (OTCQB:RLMLF) at the time of writing is approximately US$70 million.

The gap between these two companies is 38 to 1.

HORSE HEAVEN PROJECT: KEY FACTS

14,580 acres   |   100% owned   |   Valley County, Idaho

Adjacent to Perpetua Resources’ permitted US$2.71B Stibnite Gold Project

Two primary targets: Antimony Ridge and Golden Gate

Cash: A$28.2M   |   Debt: Nil   |   Market cap: ~US$70M

FAST-41 White House Permitting Coverage granted April 2026

NASDAQ listing pending

Why are investors looking at Resolution Minerals?​
Real assets. Real partnerships. Real drill results on the calendar. A defense supply deadline that re-rates the entire sector. A market cap a fraction of the federally backed mine next door. This is what an early-stage setup looks like before the rest of the market has caught on.

Why Antimony, Tungsten, and Gold Are All Moving at Once

Antimony: The Defense Metal Most Investors Have Never Heard Of

Antimony is a component of every lead-acid battery, every artillery shell casing, and every set of night-vision goggles the US military uses. It is also essential for flame retardants, semiconductors, solar panels, and the hardening alloys in ammunition.

The US Geological Survey classifies antimony as a critical mineral with 100% import dependence. The only current domestic antimony producer, Americas Gold and Silver Corp. (NYSE:USAS), operates a single complex in Idaho at limited scale.

When China cut exports, prices went vertical. The Defense Logistics Agency quickly awarded a US$245 million stockpile contract to United States Antimony Corp. (NYSE:UAMY).13 The Pentagon’s total critical minerals stockpiling effort topped US$1 billion by late 2025.14

The market is on notice. The question is which projects can actually deliver supply. Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) is one of the few US-based developers with high-grade antimony already in the ground and a permitting pathway already in motion. 

Tungsten: The Hardest Metal on Earth Has Become the Scarcest

Tungsten holds the highest melting point of any natural metal. It is found in armor-piercing rounds, hypersonic missiles, tank plating, and aerospace components.

China controls roughly 80% of global mine output and dominates downstream processing. In December 2025, Beijing restricted tungsten exports to just 15 approved companies, a move designed to tighten supply to Western defense chains.

By early May 2026, APT Rotterdam tungsten prices had reached approximately US$3,185 per metric tonne unit, up nearly 900% over the prior twelve months.15 BMO Capital Markets analyst George Heppel described the tungsten market as the tightest he had seen in 12 years, adding: “This isn’t like lithium, where there was a huge pipeline of projects that could come online.”16

The US currently has no domestic tungsten mine production.17 The defense procurement deadline for cutting off Chinese tungsten is January 1, 2027.18

Gold: Above US$4,500 Per Ounce and Still Supported

Gold has been trading above US$4,500 per ounce in late May 2026, up more than US$1,100 per ounce compared to a year ago.19

Central banks, institutional investors, and defense-oriented funds have all increased gold exposure in response to rising geopolitical pressure. A large gold system in an established Idaho mining district, with hundreds of meters of mineralization starting right at surface, carries real portfolio weight at these prices.

Antimony Ridge: The Mine That Fueled Two World Wars Is Still in the Ground

Antimony Ridge is not a prospect. It is a past-producing mine with 3,000 feet of historic open pits.20

It supplied antimony to the US government through World War I, World War II, and the Korean War. Grades in those historic workings ran from 10% to up to 50% antimony,21 among the richest antimony ore ever recorded in North America.

Modern sampling confirms the grades are still there. Rock chips from the existing open pits average 40% antimony.22 The best single sample came back at 49.8% Sb, 1,420 g/t silver, and 3.12 g/t gold, pulled from material already sitting inside the historic trenches.23

For context: Perpetua Resources’ Stibnite project, the US$2.71 billion neighbor that just received government financing, carries antimony grades below 1%. Resolution’s (ASX:RML) (OTCQB:RLMLF) Antimony Ridge is over 40 times that grade.

Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) metallurgical test work at IMO Labs achieved 99.5% sulphide recovery from samples grading approximately 10.5% antimony.24 That means essentially all stibnite was recovered even from lower-grade feed. A separate pyrometallurgical process produced 99.38% antimony trioxide.

Resolution Minerals Ltd.  is targeting a hydromet pilot plant in 2026 and a commercial processing facility in 2027.25

Permitting is in motion. The US Permitting Council granted FAST-41 transparency coverage to the Horse Heaven Project in April 2026, locking in an agreed timeline with the Boise National Forest.26 A Plan of Operations covering 250 drill holes and large-scale bulk sampling at Antimony Ridge has been submitted.

Golden Gate: A Gold Deposit That Starts at Surface, With a Tungsten Mine Already in the Ground

Resolution Minerals (ASX:RML) (OTCQB:RLMLF) drilled 14 holes at Golden Gate in 2025 and hit gold in every single one.27 The target runs roughly three kilometers long and up to 300 meters wide. That is a 100% success rate on a first-pass program.

The Phase 1 intercepts, all starting at or near surface and all ending in open mineralization:

Phase 2 drilling started in May 2026: up to 13,700 metres across up to 45 holes with two rigs now running.28 The first three holes of 2026 returned strong sulphide alteration and veining 500 metres south of last year’s southernmost hits, in ground that had never been drilled before.29

"When you're walking at Golden Gate, you're walking on a gold deposit that starts at surface."
— Craig Lindsay, CEO US Operations, Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF)20

Golden Gate is also the site of the historic Golden Gate Tungsten Mine, which ran intermittently from the 1950s through 1980 at average grades of 1.5% to 2% WO3.30

Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) acquired the historic Johnson Creek Tungsten Mill and approximately 2,000 metric tonnes of stockpiled ore. Preliminary test work produced tungsten concentrates of 52.3% WO3, a 19-times upgrade from the starting grade.31

Initial gold metallurgy returned 94 to 95% leach recovery on oxide samples and 86 to 88% flotation recovery on sulphide samples.32 Those numbers compare favorably to most projects at this stage.

8 Reasons

This Could Be the Most Undervalued Critical Minerals Story in America Right Now

1

White House Permitting Status via FAST-41: The US Permitting Council granted FAST-41 transparency coverage in April 2026. That means agreed timelines posted publicly in Washington and federal agencies held to that schedule.33 Open-ended permitting uncertainty has killed more junior mining projects than bad geology ever has.

2

The Most Powerful Neighbor in Idaho Mining: Perpetua Resources (NASDAQ:PPTA) sits directly adjacent with a US$2.71 billion market cap and a $2.9 billion government-backed loan. Perpetua is upgrading road access and building a power line through the region. Those infrastructure improvements benefit Horse Heaven at no cost.

3

Grade That Cannot Be Matched in the District: Antimony Ridge averages 40% Sb in the historic pits. Perpetua’s Stibnite grades below 1% Sb. That is 40 times the grade from the neighbor that just received US$2.9 billion in federal financing.

4

A Gold Discovery That Starts at the Surface: 4 holes drilled in 2025. 14 hits. Intercepts of 253m, 265m, 240m, and 197m of gold mineralization starting at or near surface, all open at depth. A maiden resource estimate is targeted for Q1 2027.

5

Tungsten Optionality Most Juniors Would Not Have: A real past-producing tungsten mine in the ground. Stockpiles processing at 52.3% WO3 concentrate.34 The historic Johnson Creek Mill acquired. Smelter discussions underway. As tungsten prices move 900% in twelve months, this optionality is not small.

6

A 38-to-1 Valuation Gap to the Next-Door Neighbor: Perpetua at US$2.71 billion. Resolution Minerals at roughly US$70 million. Same geology. Same district. Same two metals at the center of the US critical minerals crisis. The market has not yet looked at what is sitting next door.

7

Fully Funded With No Debt: A$28.2 million in cash. Zero debt. An A$20 million placement in April 2026 was led by institutional investors Tribeca Investment Partners and L1 Capital.35

8

NASDAQ Listing Coming Soon: The NASDAQ dual listing is expected late spring or early summer 2026. That opens the door to US institutional capital, including funds that cannot hold a position on a foreign exchange. The access unlock is close.

Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) is funded and permitted to execute the plan as laid out.

Why are investors looking at Resolution Minerals?​
Real assets. Real partnerships. Real drill results on the calendar. A defense supply deadline that re-rates the entire sector. A market cap a fraction of the federally backed mine next door. This is what an early-stage setup looks like before the rest of the market has caught on.

The Perpetua Comparison: What “Stibnite 2.0” Actually Means

Craig Lindsay put it plainly in a recent interview: “I refer to Horse Heaven as Stibnite 2.0.”

That framing is grounded in geology, not promotion.

Perpetua Resources (NASDAQ:PPTA) controls the Stibnite Gold Project, a multi-million-ounce gold deposit with an antimony reserve the US government has described as the only identified domestic source of the metal. A US$2.9 billion federal loan backs its construction. The mine is expected to be operational in 2029.

The path from a small-cap Idaho junior to a federally backed multi-billion-dollar mine in this exact district has already been walked. It happened right next door.

 

Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) is the only company with a large-scale, high-grade antimony project immediately adjacent to the Stibnite district. The grades at Antimony Ridge are 40 times higher than what Perpetua is mining.

The $2.9 billion EXIM loan is not just financing for Perpetua. It is a government signal that Idaho antimony is a national security asset and the entire district deserves attention. That signal reaches everything in the region, including what is sitting right next door.

The Permitting Edge: Why FAST-41 Changes the Math for This Project

Junior mining companies in the United States have historically faced one problem above all others: time. Permitting processes with no fixed timeline and no accountability have derailed more projects than bad rock ever has.

FAST-41 is a White House Permitting Council program that changes that. Created in 2015 and now actively implemented, it establishes agreed timelines and posts them publicly. Federal agencies are held to that schedule.

Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) received FAST-41 transparency coverage on April 8, 2026, specifically for Antimony Ridge. The application covers 250 drill holes and a large-scale bulk sampling program.36

The site has no legacy environmental complexity. Historical mining at Antimony Ridge was small-scale and all processing was done off-site at neighboring mills. There are no environmental liabilities requiring cleanup, no contaminated tailings, no remediation backlog.

Idaho is a mining-friendly state with a long history of active extraction across silver, phosphate, molybdenum, copper, gold, and now antimony. The state government is supportive and the Idaho Mining Association has seen meaningful growth in activity over the past several years.

The Catalyst Calendar: A Lot of News Is Coming

Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) is entering a dense stretch of scheduled milestones. 

As Craig Lindsay said recently: “It’s going to be a news-rich cycle from here through to the end of the year from an investor perspective. On the heels of this NASDAQ listing, there will be a lot of very good news, a lot of it from the drill bit.”

UPCOMING MILESTONES

MAY TO AUGUST 2026

13,700 metres / 45-hole diamond core drill program at Golden Gate, two rigs active

Drill results expected on a rolling basis: gold and tungsten intercepts

LATE SPRING / EARLY SUMMER 2026

NASDAQ dual listing expected, opening access to US institutional capital

Q2 TO Q3 2026

Antimony Ridge: bulk sampling permit advancing under FAST-41 timeline

Tungsten stockpile sales and final metallurgical results

Q4 2026 TO Q1 2027

Maiden Gold Resource Estimate targeted for Golden Gate

Antimony Ridge high-grade fast-track development planning

2027 TO 2028

Pilot plant for antimony and tungsten processing

PEA and feasibility studies

The Team: The People Who Have Been Here Before

The most overlooked signal in a junior mining company is the geological team. At Horse Heaven, the man who served as Senior Resource Geologist at Perpetua’s Stibnite project for 12 years is now consulting for Resolution Minerals (ASX:RML) (OTCQB:RLMLF).

That is not by accident. That is institutional knowledge about exactly this district, applied to the property next door.

Craig LindsayCEO of US Operations

Over 30 years in M&A and corporate development. Craig has led four companies from start-up to successful sale, including Otis Gold Corp (developer of the Kilgore Gold Project in Idaho), which was acquired by Excellon Resources Inc (TSX:EXN). He was also founder and CEO of Magnum Uranium Corp, acquired by Energy Fuels Inc (NYSE:EFR), and founder of OneAsia.com (Holding) Ltd, acquired by Tom Group Limited. He has served as director of numerous public companies.
Brett LynchIncoming Non-Executive Director (Appointment Pending)

Brett is one of the most recognized mine restart specialists in North America. He previously served as managing director of Sayona Mining, now Elevra Lithium, where he led the company’s transformation from a small-cap lithium explorer into a multibillion-dollar North American lithium producer. He has also held senior roles with MIM Holdings, New Hope Corporation and Orica, and currently serves as chairman of Ionic Rare Earths.
Steve PromnitzStrategic Advisor

Stephen Promnitz has considerable technical and commercial experience in Argentina; and is a geologist with a history of exploring, funding and developing projects. He developed Lake Resources Ltd (ASX: LKE) from a $1 million market cap explorer into a $3 billion critical metals company through Lake’s Kachi Lithium Project. He brings extensive US and international institutional investor networks, as well as a strong following within the broader mining investment community.
Dr. Adam RoperPhD, Metallurgical Lead

PhD in Antimony Geochemistry. Over a decade of experience in process development, piloting, and flowsheet optimization for complex strategic metals. Adam produced the 99.38% antimony trioxide result and the 52.3% WO3 tungsten concentrate from bench-scale work. He is developing the processing flowsheet in-house.
Bill BreenTechnical Lead, Licensed Professional Geologist

Over 40 years in senior leadership roles with Teck, Newmont, and Freeport McMoRan. A Qualified Person under both Canadian NI 43-101 and the Australian JORC Code. Bill has worked at Antimony Ridge for more than 15 years.
Austin ZinsserConsulting Geologist

Austin served as Senior Resource Geologist at Perpetua’s Stibnite project for 12 years, during which the company grew from a $50 million junior to over $2 billion in market cap. He has been consulting to Horse Heaven since 2022. There is no stronger geological reference point for what an antimony-gold system in this district can become.

The Setup Is Right in Front of You

Let’s go back to the beginning.

China cut antimony exports. The Pentagon scrambled. Tungsten prices rose 900% in twelve months. Gold passed $4,500 per ounce.

The US government committed $2.9 billion to build a domestic antimony mine in Idaho, right next door.

Resolution Minerals Ltd. (ASX:RML) (OTCQB:RLMLF) owns the adjacent property. It holds antimony grades over 40 times higher than Stibnite. It has a gold system with hundreds of meters of mineralization starting at surface. It has a past-producing tungsten mine, stockpiles processing at 52.3% WO3, and an in-house PhD metallurgist building the flowsheet.

It has White House permitting backing, A$28.2 million in cash, no debt, institutional shareholders, and the geologist who spent 12 years building Perpetua’s resource, now working on this project.

The NASDAQ listing is weeks away. Drill results are rolling in. The first three holes of 2026 confirmed mineralization 500 metres south of last year’s hits, in previously undrilled ground.

The company’s market cap is roughly $70 million.

The neighbor’s is $3.4 billion.

That gap does not stay there forever. The only question is whether you are in before it starts to close.

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All figures in Australian dollars unless otherwise stated. USD conversions are approximate.

Why are investors looking at Resolution Minerals?​
Real assets. Real partnerships. Real drill results on the calendar. A defense supply deadline that re-rates the entire sector. A market cap a fraction of the federally backed mine next door. This is what an early-stage setup looks like before the rest of the market has caught on.

Disclaimer