FOR IMMEDIATE RELEASE

7 November 2022

LSE: PDL

Petra Diamonds Limited
(“Petra”) or the (“Company”)

Tailings Storage Facility wall breach at Williamson in Tanzania

Petra announces that earlier today the eastern wall of the Tailings Storage Facility (TSF) at the Williamson mine was breached, resulting in flooding away from the pit which has extended into certain areas outside of the mine lease area.

Williamson’s management are at the affected areas together with the Regional and District Commissioners. Government and Mine emergency response teams have been mobilised. To date, no injuries or fatalities have been confirmed and the teams on the ground are engaging with community members to keep them away from the affected area.

A CEO-led team is being sent to the site to assist the mine team and to provide any support required. Williamson’s management is working closely with local and regional authorities and Petra will provide further updates as information becomes available.  Mine production has been suspended pending an investigation into the incident.

Petra currently has a 75% shareholding in Williamson Diamonds Limited, with the Government of Tanzania owns the remaining 25%.

This announcement includes inside information as defined in Article 7 of the UK Market Abuse Regulation No. 596/2014 and is being released on behalf of Petra by the Company Secretary.

For further information, please contact:

Petra Diamonds, London                 Telephone: +44 20 7494 8203

Patrick Pittaway                                  [email protected]         

Julia Stone

About Petra Diamonds Limited

Petra Diamonds is a leading independent diamond mining group and a supplier of gem quality rough diamonds to the international market. The Company’s portfolio incorporates interests in three underground producing mines in South Africa (Finsch, Cullinan Mine and Koffiefontein) and one open pit mine in Tanzania (Williamson).

Petra's strategy is to focus on value rather than volume production by optimising recoveries from its high-quality asset base in order to maximise their efficiency and profitability. The Group has a significant resource base of 226.6 million carats, which supports the potential for long-life operations.

Petra strives to conduct all operations according to the highest ethical standards and only operates in countries which are members of the Kimberley Process. The Company aims to generate tangible value for each of its stakeholders, thereby contributing to the socio-economic development of its host countries and supporting long-term sustainable operations to the benefit of its employees, partners and communities.

Petra is quoted with a premium listing on the Main Market of the London Stock Exchange under the ticker 'PDL'. The Company’s notes due in 2026 are listed on the Irish Stock Exchange and admitted to trading on the Global Exchange Market. For more information, visit www.petradiamonds.com.