PMET Demonstrates >97% Caesium Extraction from Pollucite Concentrate Multiple pathways to value-add caesium chemicals identified during b ench-scale extraction testwork at SGS Lakefield and through Koch Technology Solutions Phase 1 program
PMET Resources Inc.
Suite 900 - 1801 McGill College, Montreal, Qc, Canada, H3A 1Z4
www.pmet.ca / TSX: PMET / ASX: PMT / OTC: PMETF / FSE: R9GA
PMET Demonstrates >97% Caesium Extraction from Pollucite
Concentrate
Multiple pathways to value-add caesium chemicals identified during b ench-scale extraction testwork at
SGS Lakefield and through Koch Technology Solutions Phase 1 program
July 12, 2026 – Montreal, QC, Canada July 13, 2026 – Sydney, Australia
HIGHLIGHTS
SGS CANADA CAESIUM EXTRACTION TEST PROGRAM
• Leaching of pollucite concentrate using sulphuric acid was highly successful with
>97% recovery of the caesium (Cs) into solution achieved.
• Bench-scale testwork on impurity removal was also successful, demonstrating
efficient removal of key impurities such as aluminum.
• Opportunity identified to potentially recover a rubidium by-product.
• Primary objective of program was fully realized – that being to identify a preliminary
set of conditions to extract caesium from pollucite concentrate (produced from the Vega
Zone) at high recovery while characterizing (and limiting) the impurity profile.
• Next steps will build upon this extraction phase of work with a primary objective to
produce gram quantities of high-purity Cs-sulphate, Cs-carbonate, Cs-formate,
and potentially Rb-carbonate.
KOCH TECHNOLOGY SOLUTIONS CAESIUM EXTRACTION TEST PROGRAM
• PMET is working with Koch Technology Solutions, part of Koch Inc., evaluating advanced
processing pathways to value-added caesium products.
• Preliminary results from Phase 1 indicate both synthetic and live Pregnant Leaching
Solution yield very selective high loading factors of c aesium recovery using
Koch’s proprietary flow sheet.
PMET RESOURCES INC. (THE “COMPANY” OR “PMET”) (TSX: PMET) (ASX: PMT)
(OTCQX: PMETF) (FSE: R9GA is pleased to provide an update on two parallel bench-scale
testwork programs focused on caesium (Cs) extraction from pollucite samples fro m the
Shaakichiuwaanaan Project. Both approaches – conventional by SGS Canada, and proprietary by
Koch Technology Solutions – offer attractive process routes for caesium extraction from
pollucite concentrate into marketable chemical products. The Company is motivated to consider
caesium value-added chemical production (with key partners) to unlock maximum value from its
globally significant caesium resource and its pollucite concentrates produced at site.
In addition to being one of the largest lithium-tantalum pegmatite Mineral Resources1 and lithium
pegmatite Mineral Reserves2 globally, the Property also hosts the world’s largest in-situ pollucite-
hosted caesium pegmatite Mineral Resource, comprising 0.69 Mt at 4.40% Cs2O (Indicated) and
1.70 Mt at 2.40% Cs2O (Inferred). The CV13 Pegmatite, host to the caesium Mineral Resource,
is located <3 km along trend from the CV5 Pegmatite, which is situated approximately 13 km
south of the regional Trans -Taiga Road and powerline infrastructure corridor, and is accessible
year-round by road.
The pollucite concentrate used as feed for both extraction testwork programs ( Figure 1, top)
was produced by X -Ray Transmission (XRT) ore sorting of drill core material from the Vega
Caesium Zone at the CV13 Pegmatite (see news release dated October 9, 2025) and assayed
12% Cs2O (Figure 2).
SGS Canada Caesium Extraction Testwork Program
At SGS Lakefield, a conventual process approach (Figure 1, bottom) for caesium extraction from
pollucite concentrate is being advanced using sulphuric acid digestion (H 2SO4) and subsequent
impurity removal. The primary objective of this initia l bench-scale test program is to identify a
preliminary set of conditions to extract caesium at high recovery while characterizing (and
limiting) the impurity profile.
The pollucite concentrate sample (~15 kg) was ground to varying sizes (P80 of 75 µm to 212 µm)
and a portion (<4 kg) subjected to sulphuric acid (H 2SO4) leaching at varying temperatures (up
to 120°C). The program was highly successful with the testwork achieving consistently high
extractions of 97- 98% Cs while maintaining significantly lower extractions of key
impurities (e.g., Al). Further, s ubsequent impurity tests successfully removed the remaining
aluminum (Al) and a majority of the sulphur (S) with negligible caesium (Cs) losses.
Additionally, the program also identified a potential opportunity to recover a rubidium by-
product from one of the waste streams . Further characterization of this opportunity was not
undertaken during this initial bench-scale caesium extraction test phase and will be investigated
as a secondary objective in future work.
The testwork was completed at SGS Canada ’s Lakefield, Ontario , facility with support from
Primero Group Americas and a Company-retained Subject Matter Expert ("SME") specializing in
caesium extraction and recovery from pollucite. These three parties, in addition to TOMRA
Mining, are also key contributors to the design and execution of the Company’s ore sorting
programs.
1 Consolidated MRE (CV5 + CV13 pegmatites) totals 108.0 Mt at 1.40% Li 2O and 166 ppm Ta 2O5 (Indicated), and 33.4 Mt at 1.33%
Li2O and 155 ppm Ta 2O5 (Inferred), at an Li 2O cut-off grade of 0.40% (open -pit), 0.60% (underground CV5), and 0.70% (underground
CV13). A grade constraint of 0.50% Cs 2O was used to model the Rigel and Vega caesium zones, contained entirely within CV13, with a
MRE of 0.69 Mt at 4.40% Cs2O (Indicated), and 1.70 Mt at 2.40% Cs2O (Inferred). The Effective Date is June 20, 2025. Mineral Resources
are not Mineral Reserves as they do not have demonstrated economic viability. Mineral Resources are inclusive of Mineral Reserves.
2 Probable Mineral Reserve of 84.3 Mt at 1.26% Li2O at the CV5 Pegmatite with a cut-off grade is 0.40% Li2O (open-pit) and 0.70% Li2O
(underground). Underground development and open -pit marginal tonnage containing material above 0.37% Li 2O are also included in the
statement. The Effective Date is September 11, 2025. See Feasibility Study news release dated October 20, 2025.
Figure 1: Simplified conceptual flowsheet for conventional processing of pollucite pegmatite through to
pollucite concentrate (top) and from pollucite concentrate to final marketable caesium salts/brine
(bottom). The bench-scale testwork carried out by SGS Canada is focused on the caesium extraction and
impurity removal steps. The stated >97% Cs recovery is with respect to the pollucite concentrate feed
through to initial impurity removal.
Figure 2: Pollucite concentrate (~12% Cs 2O) produced from prior XRT ore sorting program (see news
release dated October 9, 2025) , of which a portion was used as feed for the bench- scale caesium
extraction and recovery program at SGS Canada and Koch Technology Solutions discussed herein.
Next steps will build upon this bench- scale testwork with a primary “proof -of-concept”
objective to produce gram quantit y samples of high -purity Cs -sulphate, Cs -
carbonate, Cs -formate, and potentially Rb -carbonate. This test program is currently
underway at SGS Canada’s facility in Lakefield, Ontario, with results expected circa Q4 2026.
Koch Technology Solutions Caesium Extraction Testwork Program
The testwork program with Koch Technology Solutions ( “KTS”) has been developed as part of
a strategic relationship that has evolved following the Company’s investigations of the caesium
industry, commercial engagement, and research. The program will leverage KTS’s demonstrated
capabilities in engineering, development and commercialization of critical minerals extraction
technologies to produce a range of value-added caesium chemical compounds.
The bench-scale test program being advanced by KTS is designed to assess the application of their
proprietary flowsheet technology , to produce a range of value -added caesium chemical
compounds. Approximately 6 kg of pollucite concentrate is being used to support the testwork.
Preliminary results from Phase 1 of the program indicate a strong and selective
caesium recovery. The testwork will now move onto Phase 2 and the Company anticipates
expanding the mandate to produce gram quantities of caesium derivative products as a complete
bench-scale proof-of-concept.
STUDY WORK UNDERWAY
A Preliminary Economic Assessment ("PEA") for the broader Project, incorporating lithium,
caesium, and tantalum, is scheduled for completion in Q4 2026. The PEA will complement the
Feasibility Study for the CV5 Pegmatite (lithium and tantalum), which is also scheduled for
completion in Q4 2026, and will provide the first economic assessment of the Project's caesium
potential.
ABOUT KOCH TECHNOLOGY SOLUTIONS.
Koch Technology Solutions (KTS) is a global leader in technology development,
commercialization and licensing. KTS works with owners, developers, and investors in the
process manufacturing and critical minerals sectors to solve complex technical and invest ment
challenges before large capital is committed, helping clients make confident decisions from early
concept through EPC-ready design. With a global network and rich history of domain experience
and expertise, KTS gains additional strength from its position within Koch Engineered Solutions
(KES). This backing enhances our ability to partner with companies developing chemical process
technologies, create attractive licensing solutions for commercial deployment, and bring the next
generation of technologies to the market.
For further information, please contact us at [email protected] or by calling +1 (604) 279- 8709, or
visit www.pmet.ca. Please also refer to the Company’s continuous disclosure filings, available
under its profile at www.sedarplus.ca and www.asx.com.au, for available exploration data.
QUALIFIED/COMPETENT PERSON
The technical and scientific information in this news release that relates to the Mineral Resource
Estimate, exploration, and metallurgical results for the Company’s properties is based on, and
fairly represents, information compiled by Mr. Darren L. Smith, M.Sc., P.Geo., who is a Qualified
Person as defined by National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI
43-101”), and member in good standing with the Ordre des Géologues du Québec (Geologist Permit
number 01968), and with the Association of Professional Engineers and Geoscientists of Alberta
(member number 87868). Mr. Smith has reviewed and approved the related technical information
in this news release.
Mr. Smith is an Executive and Vice President of Exploration for PMET Resources Inc. and holds
common shares, Restricted Share Units (RSUs), Performance Share Units (PSUs), and options in
the Company.
Mr. Smith has sufficient experience, which is relevant to the style of mineralization, type of deposit
under consideration, and to the activities being undertaken to qualify as a Competent Person as
described by the Australasian Code for Reporting of Exploration Results, Mineral Resources and
Ore Reserves (the JORC Code). Mr. Smith consents to the inclusion in this news release of the
matters based on his information in the form and context in which it appears.
The information in this news release that relates to the Mineral Reserve Estimate and Feasibility
Study is based on, and fairly represents, information compiled by Mr. Frédéric Mercier-Langevin,
Ing. M.Sc., who is a Qualified Person as defined by NI 43-101, and member in good standing with
the Ordre des Ingénieurs du Québec. Mr. Mercier -Langevin has reviewed and approved the
related technical information in this news release.
Mr. Mercier-Langevin is the Chief Operating and Development Officer for PMET Resources Inc.
and holds common shares, RSUs, PSUs, and options in the Company.
ABOUT PMET RESOURCES INC.
PMET Resources Inc. is a pegmatite critical mineral exploration and development company
focused on advancing its district -scale 100%-owned Shaakichiuwaanaan Property located in the
Eeyou Istchee James Bay region of Quebec, Canada, which is accessible year-round by all-season
road and proximal to regional hydro-power infrastructure.
In late 2025, the Company announced a positive lithium -only Feasibility Study on the CV5
Pegmatite for the Shaakichiuwaanaan Property and declared a maiden Mineral Reserve of 84.3 Mt
at 1.26% Li 2O (Probable) 3. The study outlines the potential for a competitive and globally
significant high-grade lithium project targeting up to ~800 ktpa spodumene concentrate using a
simple Dense Media Separation (“DMS”) only process flowsheet. Further, the results highlight
Shaakichiuwaanaan as a potential North American critical mineral powerhouse with significant
opportunity for tantalum and caesium in addition to lithium.
The Project hosts a Consolidated Mineral Resource 4 totalling 108.0 Mt at 1.40% Li 2O and 166
ppm Ta2O5 (Indicated) and 33.4 Mt at 1.33% Li 2O and 155 ppm Ta2O5 (Inferred), and ranks as a
top ten lithium pegmatite globally in size. Additionally, the Project hosts the world’s
largest pollucite-hosted caesium pegmatite Mineral Resource at the Rigel and Vega zones with
0.69 Mt at 4.40% Cs2O (Indicated), and 1.70 Mt at 2.40% Cs2O (Inferred).
3 See Feasibility Study news release dated October 20, 2025. Probable Mineral Reserve cut-off grade is 0.40% Li2O (open-pit) and 0.70%
Li2O (underground). Underground development and open -pit marginal tonnage containing material above 0.37% Li 2O are also included in
the statement. Effective Date of September 11, 2025.
4 Consolidated MRE (CV5 + CV13 pegmatites) is reported at an Li2O cut-off grade of 0.40% (open -pit), 0.60% (underground CV5), and
0.70% (underground CV13). A grade constraint of 0.50% Cs 2O was used to model the Rigel and Vega caesium zones, contained entirely
within CV13. The Effective Date is June 20, 2025. Mineral Resources are not Mineral Reserves as they do not have demonstrated economic
viability. Mineral Resources are inclusive of Mineral Reserves.
This news release has been approved by
“KEN BRINSDEN”
Kenneth Brinsden, President, CEO, & Managing Director
Olivier Caza-Lapointe
Head, Investor Relations
T: +1 (514) 913-5264
DISCLAIMER FOR FORWARD-LOOKING INFORMATION
This news release contains “forward -looking statements” and “forward -looking information”
within the meaning of applicable securities laws.
All statements, other than statements of present or historical facts, are forward -looking
statements. Forward -looking statements involve known and unknown risks, uncertainties and
assumptions and accordingly, actual results could differ materially from tho se expressed or
implied in such statements. You are hence cautioned not to place undue reliance on forward-
looking statements. Forward-looking statements are typically identified by words or expressions
such as “pathways”, “opportunity”, “potentially”, “objective”, “preliminary”, “conditions”, “next
steps”, “build upon”, “marketable, “to consider”, “to unlock”, “being advanced”, “scheduled, or
variations of such words or expressions and phrases or statements that certain actions, events
or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved.
Forward-looking statements include, but are not limited to, statements concerning SGS Canada
and KTS Caesium Extraction Test Program, the schedule for the PEA and Feasibility Study for
the CV5 Pegmatite and the economics of caesium.
Forward-looking statements are based upon certain assumptions and other important factors
that, if untrue, could cause actual results to be materially different from future results expressed
or implied by such statements. There can be no assurance that for ward-looking statements will
prove to be accurate. Key assumptions upon which the Company’s forward-looking information
is based include, without limitation, the ability to obtain the required financing to bring the project
to development, the ability to make discoveries, the potential of each of tantalum, lithium and
caesium , that proposed exploration work on the Property and the results therefrom will
continue as expected, the accuracy of reserve and resource estimates, the classification of
resources and the assumptions on which the reserve and resource estimates a re based, long -
term demand for lithium (spodumene), tantalum (tantalite), and caesium (pollucite) supply, and
that exploration and development results continue to support management’s current plans for
the Property’s development.
Forward-looking statements are also subject to risks and uncertainties facing the Company’s
business, any of which could have a material adverse effect on the Company’s business, financial
condition, results of operations and growth prospects. Readers should review the detailed risk
discussion in the Company’s most recent Annual Information Form filed on SEDAR+, for a fuller
understanding of the risks and uncertainties that affect the Company’s business and operations.
Although the Company believes its expectations are based upon reasonable assumptions and has
attempted to identify important factors that could cause actual actions, events or results to differ
materially from those described in forward-looking statements, there may be other factors that
cause actions, events or results not to be as anticipated, estimated or intended. There can be no
assurance that forward- looking information will prove to be accurate. If any of the risks or
uncertainties mentioned above, which are not exhaustive, materialize, actual results may vary
materially from those anticipated in the forward-looking statements.
The forward- looking statements contained herein are made only as of the date hereof. The
Company disclaims any intention or obligation to update or revise any forward- looking
statements, whether as a result of new information, future events or otherwise, except to the
extent required by applicable law. The Company qualifies all of its forward-looking statements by
these cautionary statements.
COMPETENT PERSON STATEMENT (ASX LISTING RULES)
The information in this news release that relates to the Feasibility Study (“FS”) for the
Shaakichiuwaanaan Project, which was first reported by the Company in a market announcement
titled “ PMET Resources Delivers Positive CV5 Lithium -Only Feasibility Study for its Large-Scale
Shaakichiuwaanaan Project” dated October 20, 2025 (Montreal time) is available on the Company’s
website at www.pmet.ca , on SEDAR+ at www.sedarplus.ca and on the ASX website at
www.asx.com.au. The production target from the Feasibility Study referred to in this news
release was reported by the Company in accordance with ASX Listing Rule 5.16 on the date of
the original announcement. The Company confirms that, as of the date of this news releas e, all
material assumptions and technical parameters underpinning the production target in the original
announcement continue to apply and have not materially changed.
The Mineral Resource and Mineral Reserve Estimates in this release were first reported by the
Company in accordance with ASX Listing Rule s 5.8 and 5.9 in market announcements titled
"World's Largest Pollucite- Hosted Caesium Pegmatite Deposit " dated July 20, 2025 (Montreal time)
and “ PMET Resources Delivers Positive CV5 Lithium -Only Feasibility Study for its Large-Scale
Shaakichiuwaanaan Project ” dated October 20, 2025 (Montreal time) and are available on the
Company’s website at www.pmet.ca, on SEDAR+ at www.sedarplus.ca and on the ASX website
at www.asx.com.au. The Company confirms that, as of the date of this news release, it is not
aware of any new information or data verified by the competent person that materially affects
the information included in the relevant announcement and that all material assumptions and
technical parameters underpinning the estimates in the relevant announcement continue to apply
and have not materially changed. The Company confirms that, as at the date of this
announcement, the form and context in which the competent person’s findings are presented
have not been materially modified from the original market announcement.
APPENDIX 1 – JORC CODE 2012 TABLE 1 (ASX LISTING RULE 5.8.2)
Section 1 – Sampling Techniques and Data
Criteria JORC Code explanation Commentary
Sampling techniques • Nature and quality of sampling (eg cut • Pollucite concentrate, assaying ~12% Cs 2O, was used
Criteria JORC Code explanation Commentary
channels, random chips, or specific
specialized industry standard
measurement tools appropriate to the
minerals under investigation, such as
down hole gamma sondes, or handheld
XRF instruments, etc). These examples
should not be taken as limiting the
broad meaning of sampling.
• Include reference to measures taken to
ensure sample representivity and the
appropriate calibration of any
measurement tools or systems used.
• Aspects of the determination of
mineralization that are Material to the
Public Report.
• In cases where ‘industry standard’
work has been done this would be
relatively simple (eg ‘reverse
circulation drilling was used to obtain 1
m samples from which 3 kg was
pulverized to produce a 30 g charge for
fire assay’). In other cases more
explanation may be required, such as
where there is coarse gold that has
inherent sampling problems. Unusual
commodities or mineralization types
(eg submarine nodules) may warrant
disclosure of detailed information.
as feed to the bench-scale caesium extraction test
programs discussed herein. This pollucite concentrate
was produced using XRT ore sorting on NQ-sized drill
core (half -core) collected from the Vega Caesium
Zone as described in news release dated October 9,
2025.
Drilling techniques • Drill type (eg core, reverse circulation,
open-hole hammer, rotary air blast,
auger, Bangka, sonic, etc) and details
(eg core diameter, triple or standard
tube, depth of diamond tails, face -
sampling bit or other type, whether
core is oriented and if so, by what
method, etc).
• N/A. No drill results reported.
Drill sample
recovery
• Method of recording and assessing
core and chip sample recoveries and
results assessed.
• Measures taken to maximize sample
recovery and ensure representative
nature of the samples.
• Whether a relationship exists between
sample recovery and grade and
whether sample bias may have
occurred due to preferential loss/gain
• N/A. No drill results reported.