Cullinan Mine is Petra’s flagship asset and a world-class kimberlite, famous for being home of the largest gem diamond (3,106cts) ever recovered as well as being the world’s most important source of blue diamonds.

The National Union of Mineworkers (NUM) has strongly condemned Petra Diamonds' decision to place its Finch Diamond Mine in Kimberley under business rescue and issue a Section 189A retrenchment notice at its Cullinan Diamond Mine.

The union on Sunday warned that nearly 1,800 jobs and the livelihoods of thousands of families are under threat as a result of these actions.

In a statement, the union said the business rescue process at Finch has left about 689 workers facing uncertainty, while the retrenchment consultation process at Cullinan could affect approximately 1,090 employees.

Together, the developments place close to 1,800 jobs at risk and threaten the economic stability of mining communities that rely on the operations.