Southstone Announces Extension to Botswana Uranium Acquisition

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Southstone Minerals Limited

2751 Graham Street

Victoria, BC, Canada, V8T 3Z1

TSX Venture : SML

www.southstoneminerals.com

SOUTHSTONE ANNOUNCES EXTENSION TO BOTSWANA URANIUM ACQUISITION

VICTORIA, BRITISH COLUMBIA – 21 JULY 2025 – Southstone Minerals Limited (“Southstone”) or the “Company”) (TSXV: SML)

announces that it has entered into Addendum 1 to the binding term sheet with Afrium Energy Pte. Ltd. (“Afrium”), originally

signed February 13, 2025.

The Addendum, executed July 14, 2025, extends the End Date of the acquisition agreement by an additional 60 days to

September 12, 2025. All other terms of the original agreement remain unchanged and in full force.

Southstone remains committed to advancing this strategic transaction while continuing to focus on its core operations at the

Oena Diamond Mine.

ON BEHALF OF THE BOARD OF DIRECTORS OF SOUTHSTONE MINERALS LIMITED

Terry L. Tucker, P.Geo.

Executive Chairman

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. Capitalized terms used herein that have not been defined have the same

meanings ascribed in the policies of the TSX.V.

Forward Looking Statements Disclaimer

Certain statements in this release are forward -looking statements, which are statements that are not purely historical, including any

statements regarding beliefs, plans, expectations, or intentions regarding the future. Forward looking statements in this news release

include statements relating to the Company’s proposed production timeline, and the Company’s plans for future production from the Oena

Diamond Mine. Forward- looking statements are often identified by terms such as “will”, “may”, “should”, “ant icipate”, “expects” and

similar expressions. All statements included in this news release, other than statements of historical fact, are forward -looking statements

that involve risks and uncertainties. There can be no assurance that such statements will prove to be accurate and actual results, and future

events could differ materially from those anticipated in such statements. Important factors that could cause actual results t o differ

materially from the Company’s expectations include quality and quantity of any mineral deposits that may be located, the Company’s

inability to obtain any necessary permits, consents or authorizations required for its activities, the Company’s inability to raise the necessary

capital to be fully able to implement its business strategies, and other risks and uncertainties disclosed in the Company’s latest interim

Management Discussion and Analysis filed with certain securities commissions in Canada.

Forward-looking statements regarding operational expectations are based on management's assessment of current mining conditions,

contractor performance, and geological characteristics of identified zones.

The reader is cautioned that assumptions used in the preparation of any forward -looking statements herein may prove to be incorrect.

Events or circumstances may cause actual results to differ materially from those predicted, as a result of numerous known and unknown

risks, uncertainties, and other factors, many of which are beyond the control of the Company. The reader is cautioned not to place undue

reliance on any forward-looking information. Such information, although considered reasonable by management at the time of preparation,

may prove to be incorrect, and actual results may differ materially from those anticipated. Forward- looking statements contained in this

news release are expressly qualified by this cautionary statement. The forward-looking statements contained in this news release are made

as of the date of this news release and the Company will update or revise publicly any of the included forward- looking statements as

expressly required by Canadian securities law.

A comprehensive discussion of risks and uncertainties that may affect Southstone can be found in its public filings available at

http://www.sedarplus.ca.