Quantum Critical Metals Reports 150 Meters of 38gpt Gallium, 694gpt Rubidium, 72gpt Niobium, 8gpt Cesium, and 9gpt Tantalum from Diamond Drilling at

Vancouver, BC / April 9, 2025 / The Newswire – Quantum Critical Metals Corp. (TSX.V: LEAP) (OTCQB: ATOXF) (Frankfurt: 86A1) (“Quantum” or the “Company”) is pleased to announce that it has re-examined its drill core assays at its 100% owned Discovery project, located in the Eeyou Istchee (James Bay) region of Québec, and has discovered elevated and consistent intervals of gallium, rubidium, cesium, niobium, and tantalum. Notably, the Company intersected:

• 37gpt gallium, 936gpt rubidium, 72gpt niobium, 8gpt cesium, and 10gpt tantalum over 30 meters from 9m to 39m.
• 38gpt gallium, 694gpt rubidium, 72gpt niobium, 8gpt cesium, 9gpt tantalum over 150 meters from 44 to 194 meters.
• 37gpt gallium, 651gpt rubidium, 57gpt niobium, 15gpt cesium, 11gpt tantalum over 73 meters from 17 to 90 meters.
• 44gpt gallium, 801gpt rubidium, 66gpt niobium, 16gpt cesium, 36gpt tantalum over 43 meters from 16 to 59 meters.

The Company’s 2018 and 2022 drill programs totalled approximately 2,432 meters, and 1,696 meters respectively, for a total of 4,128 meters across 22 holes. These programs were originally initiated for gold exploration, but given recent geopolitical developments regarding critical metals, the Company revisited these results to investigate any further potential that may exist than what was originally considered in the past.

As a function of this review, management believes it has uncovered its second gallium-rubidium-cesium discovery, joining the NMX East gallium-rubidium-cesium project in the Company’s portfolio. The zones containing anomalous gallium, rubidium, cesium, tantalum and niobium were mostly pegmatite dykes, however several intercepts contained metasediments, granite and granophyre rock types. Meanwhile the Company has also identified indicators of a potential VMS system intersecting these results, including anomalous lead-copper-zinc, which management believes also warrant further attention and investigation.

About the Discovery Project

The 100% owned Discovery Project spans 6,082 hectares and is located southwest of the past producing Troilus gold and copper mine (TSX-TLG), as well as the Moblan lithium deposit. The Discovery property is situated in the Frotet-Evans Greenstone belt, a volcanic-sedimentary assemblage which contains a central sedimentary basin.

Several rounds of geophysical surveys and soil geochemistry lines were completed on the Discovery property from 2013 to 2017. Exploratory drilling was completed in 2018 and 2022 to try to locate the source of the gold occurrences at surface. In 2014, an exploration campaign was conducted and returned up to 41.6 and 46.6 gpt gold in channel samples located 36 metres apart. Field mapping was completed in 2022, 2023, and 2024.

The Discovery Property Polymetallic Potential

The Discovery Project covers an important geological NE-SW regional structure and the Company recognizes this property for its polymetallic potential.

Gold: found within quartz veins hosted within a metabasalt, up to 46.6 g/pt. Historically, elevated gold contents have been found in veins which appear to have an orange, brown iron-stained appearance and are typically deformed, sheared and locally folded.

Critical Metals: While reviewing the historical drill data and assays of the Discovery Property, the geological team noticed anomalous gallium, rubidium, niobium, cesium and tantalum values in the drill core assays. Gallium, rubidium, cesium, tantalum, niobium have been found in 2018 and 2022 drill holes, hosted mostly in pegmatites. Over 50 pegmatites outcrops have been mapped to date on the property.

Base Metals (Zn, Cu, Ni, Pb): several zinc soil anomalies, banded magnetite in outcrop, outcrops containing massive and breccia in-fill pyrite and pyrrhotite, and possible Cu, Pb, Ni, Zn anomalies in drill core are also present and require further investigation.

Why This Project Matters

• Breakthrough Discovery in Critical Metals: The Discovery Project now hosts confirmed intervals of gallium, rubidium, cesium, niobium, and tantalum—strategic critical metals essential to global supply chains and energy transition technologies.
• Strengthening North American Critical Mineral Security: With China’s recent export restrictions on several critical elements, discoveries like this in Canada are vital to national and allied efforts to localize and secure supply chains.
• High-Grade and Long Intervals: Assays returned consistent, elevated grades across long intercepts—up to 150 meters—with particularly impressive grades of rubidium, gallium, and niobium, underscoring the scale and potential of the system.
• Supports Existing Portfolio: This second discovery of gallium-rubidium-cesium mineralization further validates Quantum’s exploration model and enhances the Company’s reputation as a key emerging player in the critical metals space.
• Emerging VMS Signatures: The presence of base metals such as copper, zinc, and lead—coinciding with high-value critical metals—suggests broader potential for a multi-metal system worthy of further exploration.

Marcy Kiesman, CEO of Quantum Critical Metals, commented: “The Discovery Project has lived up to its name. What began as a gold-focused exploration campaign has now yielded a new discovery of critical metals at a time when the world needs them most. Gallium remains essential for future technologies, including telecommunications, and defense while global supply chains remain heavily dependent on China. These results not only solidify our position in the gallium-rubidium-cesium space but also expand the strategic relevance of our portfolio. With the geopolitical landscape shifting rapidly, our commitment to uncovering and securing domestic sources of these high-value metals is stronger than ever.”

Next Steps

Quantum Critical Metals will now prioritize mineralogy and metallurgy of this discovery to better assess recovery potential, as well as closer geological and geophysical reviews to help plan future drill programs. More information about the Company’s work at the Discovery project will be provided in due course.

About Gallium

Gallium is a critical component in semiconductors, telecommunications, and renewable energy sectors. Canada and the USA rely on gallium for telecommunications, defense, and green energy. Gallium is also used in semiconductors, AI circuitry, radar and microchips and could be more critical than previously realized. In 2023, global high-purity gallium production was estimated at 320 tonnes. China has imposed export controls on gallium, exacerbating supply chain challenges for the U.S. and its allies.

About Rubidium

Today most rubidium is obtained as a byproduct of lithium and since it is easily ionized it can be used to propel spacecraft engines (ion). Rubidium’s critical role in emerging technologies and its limited supply make it a valuable strategic resource. Rubidium is a niche market, with an estimated global annual consumption of less than 2,000 kilograms, primarily for high-tech applications. Prices for high-purity rubidium compounds often exceed $1 million per tonne for rubidium oxide. Applications include specialty glass, telecommunications, quantum computing, and batteries. China’s dominance in rubidium production and recent export restrictions have prompted countries like the U.S. and Australia to accelerate exploration and development of domestic resources.

About Cesium

Cesium is a rare, silvery-gold alkali metal known for its high reactivity and unique properties. It plays a critical role in various high-tech applications, including atomic clocks, medical imaging, and oil and gas drilling operations. The global cesium market was valued at approximately USD 363.58 million in 2024 and is projected to reach nearly USD 601.72 million by 2032, growing at a CAGR of 6.5%. China’s dominance in the production and supply of cesium has raised concerns about supply chain vulnerabilities.

About Critical Metals

Critical metals are essential components in modern technologies, including renewable energy systems, defense applications, and advanced electronics. Both the United States and Canada have identified specific lists of critical minerals vital to their economic and national security. The U.S. Geological Survey’s 2022 list includes 50 critical minerals, while Canada in 2024 has designated 34 minerals as critical.

Recent geopolitical developments have heightened concerns over the supply chain security of these critical metals. China, which holds a dominant position in the production and processing of several critical minerals, has implemented export bans affecting the West. These actions underscore the strategic importance of diversifying supply chains and developing domestic sources for critical metals to mitigate geo-political risks and ensure the stability of essential industries.

About Quantum Critical Metals Corp.

Quantum Critical Metals Corp. (TSX.V: LEAP) (OTCQB: ATOXF) (FSE: 86A1) is a Canadian mineral exploration company focused on advancing critical metals projects that power next-generation technologies. With a growing portfolio of promising assets—including the NMX East Gallium-Rubidium-Cesium Project in Québec, the Discovery Gallium-Rubidium-Cesium and polymetallic project in Québec, the Victory Antimony Project in British Columbia, and the Prophecy Germanium-Gallium-Zinc Project in British Columbia, among others, the Company is strategically positioned to support the West’s transition to a secure and sustainable critical metals supply.

To stay updated on Quantum’s latest developments, sign up for our mailing list and visit www.quantumcriticalmetals.com and www.sedarplus.com.

Marcy Kiesman, CEO
Telephone: 604.428.2900 or 604.339.2243
Email: info@quantumcriticalmetals.com
Website: www.quantumcriticalmetals.com

George M. Yordanov, P.Geo., a consultant to the Company, is the Qualified Person (as such term is defined in National Instrument 43-101), who has reviewed and approved the scientific and technical disclosure contained in this news release.

Forward-Looking Statements

This news release contains “forward-looking information or statements” within the meaning of applicable securities laws, which may include, without limitation, statements that address the upcoming work programs, and other statements relating to the business, financial and technical prospects of the Company. All statements in this news release, other than statements of historical facts that address events or developments that the Company expects to occur, are forward-looking statements. Although the Company believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results may differ materially from those in the forward-looking statements.

Such forward-looking information reflects the Company’s views with respect to future events and is subject to risks, uncertainties and assumptions, including those filed under the Company’s profile on SEDAR at www.sedarplus.com. The Company does not undertake to update forward-looking statements or forward-looking information, except as required by law.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.