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Koidu Kimberlite Project Location Profit Sharing Geological Setting Project History No. 1 Pipe Background Vertical Pit Development Production Exploration Geological Model No. 2 Pipe Dyke Zone A and B Blows From Pit to Polish

Tongo Diamond Field Overview Bulk Sampling Exploration Road Refurbishment Programme

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Geological Model

3D view of No. 1 Pipe geological model and drillhole intersections	Plan View of No. 1 Pipe Vertical pit

The geological model for No. 1 Pipe was created by incorporating the in-pit geological mapping, as well as the core drilling data from the three phases of drilling undertaken in 2003, 2006 and 2007. In total, 26 drillholes measuring 8,116 meters were drilled at No. 1 Pipe, delineating the pipe to a depth of 471m below surface (i.e. elevation of -80m below mean sea level).