March 27, 2009 Announced results from bulk sampling at its Tsabong kimberlite project in Botswana. The Tsabong kimberlite field contains 85 kimberlites, including the 180 hectare MK1 kimberlite. Macrodiamonds recovered from 5 of 6 kimberlites sampled. Results from MK1 include:
- 21 macrodiamonds recovered
- good indicator mineral chemistry received
December 31, 2008 In the 6 months ended, evaluation work at Tsabong during the period was focused on completion
of LDD sampling on six of the fourteen high interest kimberlites that have been identified to date at Tsabong. Processing of these samples was completed in Q1 2009, with encouraging results. Macrodiamonds were recovered from five of the six kimberlites sampled, with MK1 producing 19 macrodiamonds, all clear, white gemstones, from one of the two LDD holes drilled. When combined with the recovery of 252 microdiamonds from core drilling, from which a macrodiamond grade estimate of 25 carats per hundred tonnes ("cpht") was made, and analyses of indicator mineral chemistry, these results support the Company's belief that MK1 has significant economic potential. The recovery of six macrodiamonds from a small sample from MK38 is also considered very encouraging. Previous analysis of the size frequency distribution of microdiamonds recovered from MK38 indicated a potential macrodiamond grade of 25 to 30 cpht.
October 7, 2008 Firestone Diamonds provided an update on evaluation work at its BK11, BK16 and Tsabong diamond projects in Botswana.