Alto Cuilo Report

Petra Diamonds Ld 29 July 2003 29th July 2003 Alto Cuilo kimberlite verification Petra Diamonds Limited ('Petra'), the AIM quoted mining group, announced on 23 June 2003 the discovery of three diamondiferous kimberlites ('kimberlites'), on Petra's Alto Cuilo concession in the Lunda Norte province of Angola. This led to the appointment of the independent mining consultancy RSG Global Integrated Mining Solutions ('RSG') to review and verify the discoveries. Petra today announces that RSG has now verified the location of two of the kimberlites, named AC2 (Camambea) and AC3 (Chissombo), and verified that a further kimberlite 'must exist' in close proximity to a geophysical target at a third location (designated AC4 by Petra). The original kimberlite discovered by Petra in 1998 was designated AC1. The RSG report also states that 'No accurate survey has yet been undertaken of the size of the kimberlite bodies located. However there is evidence to infer the possible pipe surface dimensions. Excavations into the kimberlite of up to 200m in one dimension have been observed. Associated vegetation features, which may be related to an underlying kimberlite, have also been described; their dimensions extend beyond 200m. One kimberlite exposure is located 300m south of its magnetic target centre; another has no apparent relationship to a magnetic anomaly. These observations, taken together with the crater facies kimberlite lithotypes, hint at pipes of substantial size.' Adonis Pouroulis, Chairman of Petra, comments, 'This report confirms our original decision to concentrate our efforts on the Alto Cuilo project. We are very encouraged by the findings thus far.' Ends For further information, please contact: Justine Howarth / Cathy Malins Parkgreen Communications Tel: 020 7287 5544 Notes To Editors: RSG Global RSG Global offers a comprehensive range of mineral exploration, mining engineering and consultancy services to the international exploration, mining and financial sectors. RSG Global was established in September 2002 when Perth-based international mining consulting firms, Resource Service Group (RSG) and Global Mining Services (GMS), merged to form one of the largest Australian integrated industry consulting groups. RSG Global has grown to be one of the best known mining services groups worldwide and is actively involved in numerous leading resource projects on five continents. This information is provided by RNS The company news service from the London Stock Exchange
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