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In June 2008 the Company entered into an agreement with SouthernEra under which it can acquire an 87.5% interest in the BK16 kimberlite in return for carrying all costs to completion of bankable feasibility. It is situated approximately 22 kilometres north east of BK11 and 12 kilometres north of the Letlhakane Mine. It was discovered by De Beers in the 1970's and a grade of 15 cpht was reported from bulk sampling.

Limited work has been carried out on BK16 since then, until SouthernEra acquired control of the project in 2007. SouthernEra has carried out high resolution ground geophysical surveys and drilled 19 core and percussion holes totalling approximately 2,300 metres. Based on this work, BK16 is estimated to be a minimum of 3.5 hectares in size and to contain approximately 17 million tonnes of kimberlite to a depth of 200 metres. Diamonds recovered by the limited sampling carried out by SouthernEra and others has recovered predominantly high quality, white gemstones, with few industrial diamonds. This indicates that diamonds from BK16 are likely to have a high average value, possibly similar to BK11. Firestone intends to carry out bulk sampling in 2009 in order to confirm representative grades and diamond values. Subject to the results of this work, a resource development programme would be undertaken on BK16 similar to that planned on BK11.