The following amendments have been made to the "Update on incident in Mozambique" announcement, released on 16 October 2025 at 11.30am under the RNS No: 6886D. The correction relates to the title of the release and the weekday of the incident. All other details remain unchanged. The full amended text is shown below.

Incorporated in Guernsey. Guernsey registration Number: 47656.

South African external company registration number 2009/012636/10

Share code on JSE:GML (General Segment of JSE Main Board) / AIM:GEM

    ISIN: GG00BG0KTL52   |   LEI: 21380017GAVXTCYS5R31

("Gemfields" or the "Company" or the "Group")

Two Mozambique police officers killed by illegal miners at MRM

LONDON, 16 OCTOBER 2025

On Wednesday 15 October 2025, a group of approximately 40 illegal miners marched on the mine gate at Montepuez Ruby Mining ("MRM"). They proceeded to attack Mozambican police officers present at the gate, killing two, one of whom was a commander of Mozambique's Natural Resources Protection Force.

No MRM employees or contractors were injured in the attack and onsite conditions have been calm since.

MRM has been informed that the attack may be related to district immigration authorities investigating, earlier in the day, suspected illegal immigrants in a local village and during which it is reported that an individual died.

As previously disclosed, in recent weeks, the operation of MRM's new processing plant, in the final commissioning process, has been impacted by illegal miners sabotaging the plant supply infrastructure.

Gemfields and MRM continue to engage with the appropriate Mozambican governmental authorities and remains committed to the safety and security of its employees, contractors and host communities.

-ENDS-

Further information on Gemfields Group Limited can be found at:

 GEMFIELDSGROUP.COM

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NOTES TO EDITORS

About Gemfields Group Limited

Gemfields is a world-leading miner of coloured gemstones, which is dual-listed on the Johannesburg and London AIM stock exchanges.

Gemfields is the operator and 75% owner of both Kagem Mining in Zambia (a world-leading emerald mine) and Montepuez Ruby Mining in Mozambique (situated on one of the most significant recently discovered ruby deposits in the world). In addition, Gemfields holds controlling interests in various other gemstone mining and prospecting licenses in Zambia, Mozambique, Ethiopia and Madagascar.

Gemfields introduced a proprietary grading system and pioneering auction platform, which have transformed the coloured gemstone industry. Today, the company implements and invests in industry-leading policies, practices and infrastructure across its operations; aligns with relevant industry standards to underpin its responsible approach; plays an active role in working groups to modernise the sector; and raises the profile of African gems through its global marketing efforts.

Gemfields funds projects to improve health, education and livelihoods for communities around its mines, supports local conservation partners and created the Gemfields Foundation, its charitable arm, which magnifies the scale of the work already carried out by Gemfields itself.

Gemfields values transparency, legitimacy and integrity, and believes that coloured gemstones should create a positive impact for the countries and communities from which they originate.

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