June 29 (Reuters) - The world's biggest uncut diamond,
Lucara Diamond Corp's LUC.TO Lesedi la Rona gem, failed to
sell at a Sotheby's auction on Wednesday after bids fell short
of the minimum reserve price, the company said.
As a result, Lucara will be "retaining" the massive
1,109-carat stone, it said in a statement. The tennis ball-sized
gem was discovered by the Vancouver-based company in its
Botswana mine last November.