Additionally, the company also recovered two large stones weighing 124.0 carats and 71.1 carats from the same mine.

Lucara Diamond president and CEO William Lamb remarked that the 239 carat stone is one of the largest recovered stone from the Orapa kimberlite field in over 40 years of production.

"The recovery of a diamond of this size, the confirmed population of blue diamonds, and the strong operational performance in our first few quarters of operation demonstrate the quality of the assets as well as the competence of the operations team," added Lamb.

Lucara noted that the stones were mined from the central kimberlite domain that was recently declared as ore feed to the plant since the pit expands towards the south.

The company, meanwhile, has also stated that the diamond would be studied at Antwerp in Belgium and plans to sell it in the latter part of 2013.