What were the key metallurgical results for Resolution Minerals (ASX:RML)?

Resolution Minerals reported near-complete recovery of stibnite (antimony sulphide) from lower-grade samples at its Antimony Ridge project in Idaho. Testing by IMO Labs returned a 99.5% recovery rate from samples containing less than 10% antimony.

Why does the 99.5% recovery rate matter for RML investors?

High recovery rates mean the company can extract almost all the target metal from the ore, reducing waste and improving potential margins. For retail traders, this de-risks the "dilution" factor—if waste rock gets mixed with high-grade ore during mining, the processing plant can still capture the antimony effectively.

What is the long-term strategy for the Resolution Minerals Antimony Ridge Project?

Resolution Minerals (ASX:RML) intends to develop Antimony Ridge as a central "hub" in Idaho to supply critical minerals including antimony, tungsten, and gold. By consolidating these metals into one regional strategy, the company aims to become a key supplier for Western critical mineral supply chains.

Is Resolution Minerals (ASX:RML) currently producing antimony?

No, the company is still in the exploration and testing phase. While the metallurgical results are a positive "proof of concept" for processing, Resolution Minerals is currently focused on defining the size of the deposit through drilling.

What are the key risks for Resolution Minerals (ASX:RML) after this news?

While processing results are excellent, the primary risk remains "resource risk"—proving there is enough mineralisation underground to justify building a multi-million dollar mine. Additionally, as a micro-cap explorer with a share price of $0.060, the company remains speculative and sensitive to capital requirements.

What is the next major catalyst for Resolution Minerals (ASX:RML)?

The immediate catalyst is a 13,700-metre diamond drilling program starting this week at the Golden Gate target. This program is designed to define the scale of gold mineralisation at depth and along strike.

When will Resolution Minerals release a formal mineral resource estimate?

Resolution Minerals expects to deliver a maiden mineral resource estimate (MRE) in the first quarter of 2027. This estimate will provide the first official calculation of how many tonnes of metal are in the ground, moving the project from "exploration" toward "development."

Image for illustrative purposes only. Not a real photo.

Resolution Minerals hits 99% recovery at Antimony Ridge

Written by Isaac FrancisPublished May. 6 2026

Resolution Minerals (ASX:RML) announced metallurgical results from its Antimony Ridge Project.

Recent laboratory testing conducted by IMO Labs in Western Australia has achieved a near-complete recovery of stibnite from lower-grade mineralisation samples.

Initial rougher flotation testing on a 15-kilogram sample—containing less than 10% antimony—returned a 99.5% sulphur recovery.

The figures provide a high level of confidence for future operations, suggesting that even if high-grade ore is diluted by waste material during the extraction process, the mineral remains highly recoverable.

This follows previous successful testing where a 99.38% antimony trioxide concentrate was produced using conventional volatilisation methods.

Strategically, Resolution Minerals is positioning Antimony Ridge as the cornerstone of a broader Idaho-based hub designed to supply essential metals, including tungsten and gold.

The project’s potential scale is supported by 3D modelling that identifies a 0.68-square-kilometre area rich in vein swarms and stockworks.

The company is shifting its focus to the Golden Gate target, where a 13,700-metre diamond drilling programme is scheduled to commence this week.

The intensive exploration campaign aims to define the depth of gold mineralisation and underpin a maiden mineral resource estimate slated for early 2027.

At the time of reporting, Resolution Minerals' share price was $0.060.