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Petra Diamonds Limited Sustainability Report 20128OVERVIEW2012 Total CapexOverviewBusiness model continuedCommitment to sustainable, long-life operationsPerhaps Petra's biggest contribution to sustainability is the commitment of significant capital to extend the life of its mines, some of which could otherwise have been closed down. The Company's currently disclosed Capex profile runs to FY 2019 (please review the 'Capex Guidance' on Petra's website for further information on this Capex profile at: http://www.petradiamonds.com/investors/analysts/analyst-guidance.aspx).The table below shows the capital invested in FY 2012.CullinanFinschKoffiefonteinKimberleyUndergroundWilliamsonExpansionary Capex (US$m)46.98.76.115.420.6Sustaining Capex (US$m)7.53.35.45.61.62012 Total Capex (US$m)54.412.011.521.022.2Current LOM (based on current mine plan)18 years (actual LOM could be+50 years)18 years (actualLOM could beconsiderably longer)13 years (actual LOM could be considerably longer)10 years (actual LOM could be longer)18 years (actual LOM could be considerably longer)Note: further to the disposal process underway, the Fissure Mines have not been included in the table above.Cullinan US$54.4mWilliamson US$22.2mFinsch US$12.0mKoffiefontein US$11.5mKimberleyUnderground US$21.0m

Petra Diamonds Limited Sustainability Report 20129OVERVIEWOverviewKey Performance IndicatorsKey Performance IndicatorsDuring FY 2012, Petra identified a range of non-financial KPIs to measure its performance on sustainability issues at a Group level.1.13Lost Time Injury Frequency Rate ("LTIFR") is defined as an occurrence that resulted in a time lost from work of one day or shift or more. LTIFR is an industry-wide measure of overall safety performance. The team is very focused on driving improvements in line with the Group's objective of zero-harm.LTIFRKPI2012DescriptionFIFR0.03Fatal Injury Frequency Rate ("FIFR") represents the number of fatalities per 200,000 hours worked. Very regrettably there was a fatality in January 2012 at Kimberley Underground; a full investigation was carried out into the accident. Fatalities are unacceptable and we target a FIFR of zero.CSI SPENDca. US$3.3 million¹Corporate Social Investment ("CSI") spend represents the total amount of expenditure on community and social projects in the Year. It shows how Petra's revenues are channelled to support our communities. Further detail on these projects can be found in the Community section of this Report.WOMEN IN THE WORKFORCE14%The percentage of female employees in our total workforce. Attracting and retaining women is a major part of establishing gender diversity in our workforce and is one of Petra's priorities.STAFF TURNOVER12%Staff turnover is calculated using the total number of employees who have left the Group during the Year, including voluntary turnover and terminations. High employee turnover can negatively impact the human capital of the Company and affect productivity. We aim to maintain low staff turnover rates.WATER USAGE14,593,831m3The total volume of water used by Petra during the Year. Water is a scarce resource in the countries where we operate so we carefully monitor its usage. ENERGY USAGE444,509,579kWhThis represents the amount of energy used by Petra for the Year. Our main sources of energy consumption are electricity and diesel. Diamond mining is an energy-intensive activity and rising electricity prices have led Petra to focus on increasing energy efficiency and reducing our usage through energy saving initiatives.CARBON EMISSIONS476,552t CO2-e2This includes all carbon emitted by the Company during the course of its activities, both direct and indirect. We have substantially improved monitoring of the consumables which account for such emissions in FY 2012.TRAINING SPENDca. US$3.3 million¹Training spend represents the total amount invested in training schemes for our workforce during the Year. Our training schemes include Adult Basic Education and Training, the Leadership Development Programme and the Bursary scheme. There is more information on these in the Our People section of this Report.1. Calculated using an average exchange rate of US$1:R7.77.2. Metric tonne carbon dioxide equivalent.