Illegally acquired and exported gold from the mineral-rich eastern Congo keeps filling the pockets of some foreign companies as well as armed groups, a new report shows.

More than 300 Dominion Diamond employees and contract workers are at risk of being laid off at the Ekati diamond mine after a fire at the mine's processing plant on June 23.

It was found at Petra's Cullinan mine in South Africa, which has yielded several massive gems, including the largest rough gem diamond ever discovered.

The history of the diamond industry in Africa has been fraught with worker exploitation, environmental destruction, government corruption and squandering of revenues.

Diamond giant will save Russian state millions each year when it takes over security duties at remote mines.

Canada's Lucara Diamond, the company that found the massive gem, said it will keep it as bids fell short of the minimum reserve price.

CEO of Lucara Diamond, the company that found it, is urging the potential buyer to leave it untouched.

Dominion Diamond still assessing damage from small fire that halted processing operations at its Canadian diamond mine last week.