Petra Diamonds extracted the third diamond weighing more than 100 carats at the Cullinan deposit using the X-ray luminescent enrichment technology of Bourevestnik, JSC

Petra Diamonds Limited – one of the key customers of Bourevestnik, JSC - has produced the third gem-quality Type II color D diamond weighing more than 100 carats since March 2019 and the fourth such stone since the beginning of the current fiscal year, at its world-famous Cullinan deposit.

The 100.83-carat gemstone on March 8 at the Cullinan mine was followed by diamond finds of 425.10 carats and 209.9 carats on March 29 and April 18, respectively.

Diamond 100.83 car. of color D type II	Diamond 209.9 car. of color D type II	Diamond 425.10 car. of color D type II

The recovery of these diamonds demonstrates the predominance of such stones in the Cullinan ore body and the ability of the mill equipment to recover the full range of diamonds.

Cullinan enrichment plant uses X-ray luminescent separators manufactured by Bourevestnik, JSC - currently, after crushing, ore of -60 +8 mm grade is treated by 10 primary separators without the use of heavy-medium beneficiation. The above-mentioned type II diamonds were recovered using a high-performance X-ray luminescent separator for primary beneficiation LS-20-09L and an X-ray luminescent separator for final beneficiation LS-OD-75.