The company has recovered 47 diamonds, of which 14 were larger than 100 carats, in this year and is planning to sell the new 257 carat diamond on tender in the fourth quarter of 2013.

Lucara Diamond president and CEO William Lamb said that the Karowe mine continues to progress with the consistent unearthing of large, high value diamonds.

"The recovery of this magnificent 257 carat diamond, along with the recovery of a significant parcel of larger stones over the past 6 months, strengthens our understanding of the resource at Karowe," Lamb added.

"In addition to the recovery of the large diamond, Lucara also closed its sixth rough diamond tender for the year where all lots were sold with very strong results."

Lucara noted that the Revenues generated from the diamonds sale will be utilised to strengthen Lucara’s balance sheet while reducing debt.

"The results of the sale will be reported in our third quarter results which are expected to be released in early November 2013."