Century Lithium Highlights Rare Earth Potential at Angel Island, Nevada
TSXV: LCE | OTCQX: CYDVF
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NEWS RELEASE
CENTURY LITHIUM HIGHLIGHTS RARE EARTH POTENTIAL
AT ANGEL ISLAND, NEVADA
December 11, 2025 – Vancouver, Canada – Century Lithium Corp. (TSXV: LCE) (OTCQX: CYDVF) (Frankfurt:
C1Z) (“Century Lithium” or “the Company is pleased to provide further details regarding its recent news
release on the recovery of rare earth elements (“REEs”) from its 100%-owned Angel Island Lithium Project
in Nevada, USA. Testing using the Company’s patent-pending chloride-based process combined with
targeted ion-exchange demonstrated both potentially significant levels of REEs in solution and
exceptionally high recoveries of REEs in ion-exchange. These results reinforce the opportunity for REEs to
become a strategically important by-product alongside Angel Island’s primary commodity, lithium
carbonate and secondary revenue stream from the sales of sodium hydroxide.
“We are very encouraged by these findings,” stated Bill Willoughby, President and CEO of Century Lithium.
“From assays, the claystone sample used for testing contained 0.024% total rare earth oxides (“TREO”).
Our ability to recover these elements efficiently from solution and in parallel with lithium is a significant
accomplishment by our team. At the scale of our planned operations, these levels of REE would contribute
meaningfully to North America’s critical mineral supply chain and revenue streams from Angel Island.”
The test work on the REEs was conducted using material taken from the 500-tonne bulk sample collected
from Angel Island. The results listed below are representative of the bulk sample and should not be
assumed representative of the Angel Island lithium claystone deposit as a whole.
The claystone material assayed 1101 ppm lithium and 239 ppm (0.024%) TREO. The REE distribution of the
sample consists of approximately 75% light rare earth elements and 25% yttrium and heavy rare earth
elements. Chloride leaching of the sample yielded solution concentrations of 210 mg/l lithium and 36 mg/l
TREO, indicating that the REEs enter solution under the same conditions as used for lithium extraction.
Two ion-exchange (“IX”) media were tested for recovery of REEs from the pregnant leach solution. Both
media demonstrated high recovery of all REEs and yttrium. The table below summarizes the feed value,
concentrations in the leach solution, and final IX recovery for selected elements.
Element * Feed (ppm) Solution (mg/l) Recovery by IX (%)
Li 1,101 229.0 0.0%
Nd + Pr 43.4 8.637 99.8%
Dy 3.8 0.994 99.8%
Tb 0.7 0.178 99.9%
Y 24.9 6.645 99.8%
Sc 14.4 0.307 97%
Others 152.2 26.379 99.8%
Total REO 239.4 35.700 99.6%
* All elements with the exception of lithium reported as oxides.
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Note: Representative samples for solids and liquids were delivered to ALS Canada Ltd. In Reno, Nevada, and analyses
performed at their independent ISO/IEC 17035 accredited laboratory in Vancouver, B.C., using methods ME-MS14
and ME-ICP-15 on liquids and ME-MS61L with REE add-on for solids. Quality control in the form of duplicates,
standards and blanks was provided by the laboratory.
Globally, a significant amount of REE production comes from deposits that are large-scale and relatively
low grade. Ion-adsorption clay deposits in southern China and Southeast Asia, for example, are long the
world’s dominant source of heavy rare earths and operate at 0.03–0.15% TREO. In the U.S., primary REE
projects in Wyoming and Texas are under development with grades between 0.05% and 0.20% TREO.
Together these illustrate that such deposits can achieve technical and strategic significance when
supported by efficient extraction methods and substantial tonnage, underscoring the potential relevance
of Angel Island’s REE content as a by-product within a large-scale lithium operation.
Angel Island is expected to process 2.75 to 5.5 million tonnes of claystone annually across the Project’s
planned Phase 1 and Phase 2, generating 10 to 20 million tonnes of leach solution per year. At this scale,
modest REE concentrations translate into strategically important quantities.
Century Lithium is not yet evaluating the economic contribution of REE recovery, as further reserve
definition and metallurgical testing are required before such analysis is appropriate. But these results on
REE recovery show Angel Island’s strategic relevance to domestic critical-mineral supply, highlight a
potential additional revenue source for the Company, and demonstrate the value of Century Lithium’s
processing technology. The Company remains fully committed to completing the updated feasibility study
and advancing permitting for Angel Island, critical milestones that will drive Angel Island toward
development.
Qualified Person
Todd Fayram, MMSA-QP and Senior Vice President, Metallurgy of Century Lithium is the qualified person
as defined by National Instrument 43-101 and has approved the technical information in this release.
ABOUT CENTURY LITHIUM CORP.
Century Lithium Corp. is an advanced-stage lithium company, focused on developing its 100%-owned
lithium project Angel Island in Esmeralda County, Nevada, which hosts one of the largest sedimentary
lithium deposits in the United States. The Company has utilized its patent-pending process for chloride
leaching combined with direct lithium extraction to make battery-grade lithium carbonate. As part of the
Company’s chlor-alkali process, the planned sale of surplus sodium hydroxide produced at Angel Island is
expected to contribute meaningfully to maintaining competitive operating costs for lithium carbonate
production.
Angel Island is one of the few advanced lithium projects in development in the United States to provide an
end-to-end process to produce battery-grade lithium carbonate for the growing electric vehicle and
battery storage market. Angel Island is currently in the permitting stage for a three-phase feasibility-level
production plan, expected to yield an estimated life-of-mine average of 34,000 tonnes per year of lithium
carbonate over a 40-year mine-life.
Century Lithium trades on both the TSX Venture Exchange under the symbol “LCE” and the OTCQX under
the symbol “CYDVF”, and on the Frankfurt Stock Exchange under the symbol “C1Z”.
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To learn more, please visit centurylithium.com.
ON BEHALF OF CENTURY LITHIUM CORP.
WILLIAM WILLOUGHBY, PhD., PE
President & Chief Executive Officer
For further information, please contact:
Spiros Cacos | Vice President, Investor Relations
Direct: +1 604 764 1851
Toll Free: 1 800 567 8181
centurylithium.com
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RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THE CONTENT OF THIS NEWS RELEASE.
Cautionary Note Regarding Forward-Looking Statements
This release contains certain forward-looking statements within the meaning of applicable Canadian
securities legislation. In certain cases, forward-looking statements can be identified by the use of words
such as "plans", "expects" or "does not anticipate", or "believes", or variations of such words and phrases
or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken",
"occur" or "be achieved" and similar expressions suggesting future outcomes or statements regarding an
outlook.
Forward-looking statements relate to any matters that are not historical facts and statements of our beliefs,
intentions and expectations about developments, results and events which will or may occur in the future,
without limitation, statements with respect to the potential development and value of the Project and
benefits associated therewith, statements with respect to the expected project economics for the Project,
such as estimates of life of mine, lithium prices, production and recoveries, capital and operating costs, IRR,
NPV and cash flows, any projections outlined in the Feasibility Study in respect of the Project, the permitting
status of the Project and the Company’s future development plans.
These and other forward-looking statements and information are subject to various known and unknown
risks and uncertainties, many of which are beyond the ability of the Company to control or predict, that may
cause their actual results, performance or achievements to be materially different from those expressed or
implied thereby, and are developed based on assumptions about such risks, uncertainties and other factors
set out herein. These risks include those described under the heading "Risk Factors" in the Company’s most
recent annual information form and its other public filings, copies of which can be under the Company’s
profile at www.sedarplus.com. The Company expressly disclaims any obligation to update-forward-looking
information except as required by applicable law. No forward-looking statement can be guaranteed, and
actual future results may vary materially. Accordingly, readers are advised not to place reliance on forward-
looking statements or information. Furthermore, Mineral Resources that are not Mineral Reserves do not
have demonstrated economic viability.