Heavy equipment is used in the 'No. 1 Pipe' at Koidu Holdings' kimberlite diamond mine in eastern Sierra Leone, March 2, 2012. Sierra Leone's only pit diamond mine has come far from its origins as wartime booty presented to mercenaries by a grateful military junta. Seventeen years and several changes of ownership later, Koidu Holdings is selling gems in outlets such as U.S. jeweller Tiffany & Co. and considering a possible public listing, which could raise hundreds of millions of dollars to fund expansion. Picture taken March 2, 2012. To match feature SIERRALEONE-DIAMONDS/ REUTERS/Simon Akam (SIERRA LEONE - Tags: ENVIRONMENT BUSINESS CONFLICT CIVIL UNREST)