Publication of Sustainability Report

Petra Diamonds Limited

("Petra" or the "Company")

Publication of Sustainability Report

Petra announces that its Sustainability Report for the financial year ended 30 June 2015 has been published and is available to view on the Company's website:

www.petradiamonds.com/investors/results-reports/.

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For further information, please contact:

Petra Diamonds, London Telephone: +44 20 7494 8203

Cathy Malins [email protected]

Cornelia Grant [email protected]

About Petra Diamonds Limited

Petra Diamonds is a leading independent diamond mining group and an increasingly important supplier of rough diamonds to the international market. The Company has interests in five producing mines: four in South Africa (Finsch, Cullinan, Koffiefontein and Kimberley Underground) and one in Tanzania (Williamson). It also maintains an exploration programme in Botswana.

Petra has a core objective to steadily increase annual production to ca. 5 million carats by FY 2019. The Group has a significant resource base of ca. 300 million carats.

Petra conducts all operations according to the highest ethical standards and will only operate in countries which are members of the Kimberley Process. Petra is quoted with a premium listing on the Main Market of the London Stock Exchange under the ticker 'PDL' and is a member of the FTSE 250. For more information, visit the Company's website at www.petradiamonds.com.