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Petra Diamonds Limited Sustainability Report 20122OVERVIEWOverviewCompany profile and scope of this report Company PROFILEPetra Diamonds Limited ("Petra" or "the Company" or "the Group") is a leading independent diamond mining group and an important supplier of rough diamonds to the international market.$ Petra offers an exceptional growth profile, with a core objective to steadily increase annual production from 2.2 million carats in FY 2012 to 5 million carats by FY 2019. The Group has a major resource base in excess of 300 million carats, which provides a solid foundation for sustainable operations over the long term.$ Petra is a dynamic company, in which employees are encouraged to fulfil their true potential, and underpinning our success is a 'can do' attitude. $ The Group conducts all its operations according to the highest ethical standards and will only operate in countries which are members of the Kimberley Process.SCOPE OF THIS REPORTThis Report is the fourth annual Sustainability Report (the "Report") produced by Petra and covers the Company's performance in the area of sustainability for the year to 30 June 2012 ("FY 2012" or "the Year").$ This Report covers the operations managed by the Company in FY 2012, including the Finsch mine (from the date of acquisition on 14 September 2011) and the Fissure Mines (the Helam, Sedibeng and Star mines in South Africa), although Petra and its BEE partners announced the initiation of a sale process for the Fissure Mines in July 2012. $ This Report aims to provide a comprehensive overview of the Group's performance in the areas of health, safety, social and environment during FY 2012, and to set out the Group's strategy towards managing sustainability going forward. The sustainability issues that are deemed to be most material to the Group are discussed and, where applicable, illustrative case studies are provided. This Report should be read in conjunction with the Company's 2012 Annual Report, which is also available to download on the Petra website at www.petradiamonds.com.$ This Report has been produced in compliance with the Global Reporting Initiative's ("GRI") G3 Guidelines and the Mining and Metals Sector Supplement. Petra has self-declared a B level of reporting for this Report, according to the GRI Guidelines - see the GRI Index on page 45 for more information.$ I n addition, Petra's sustainability policies and reporting processes are aligned with international standards, including: the UN Global Compact, the UN Universal Declaration of Human Rights, the Kimberley Process, the Extractive Industries Transparency Initiative, ISO 14001 and OHSAS 18001 and the ILO Declaration on Fundamental Principles and Rights at Work.$ All data contained in this Report is subject to internal documentation and review processes but is not audited or assured by an external agency. $ This Report is only available in electronic format, with due consideration for the environment. For more information on our sustainability reporting, please contact:Cathy MalinsCorporate Communications ManagerTel: +44 20 7494 8203Email: cathym@petradiamonds.com 52-53 Conduit Street, London W1S 2YX, UK

Petra Diamonds Limited Sustainability Report 20123OVERVIEWOverviewPetra's production cycle Petra's PRODUCTION CYCLEPetra operates an integrated and transparent business, with commitment to our values being present at every step of the production cycle.ExplorationPetra's exploration programme is focused in Botswana, where modern exploration techniques offer the potential to make new discoveries in previously explored areas.Mining and developmentPetra operates both underground and open-pit operations in South Africa and Tanzania. The Company has expansion plans in place at each of its core assets.ProcessingOnce ore has been mined, it is processed through the plant in order to disaggregate the material and extract the rough diamonds.SortingOnce cleaned and acidised, the rough diamonds are sorted by in-house experts who assign them to parcels according to their shape, size, clarity and colour.Marketing and salesOur marketing team sells the rough diamond parcels by competitive tender in both Johannesburg and Antwerp.