Petra, which owns the Finsch and Cullinan mines, said that deal of 102 million rand (£46.9m) will see it own a 49.9% interest in the mine, with Ekapa owning a 50.1% share.
Johan Dippenaar, Petra’s CEO, said: “We are delighted to have formed this consortium with Ekapa Mining in the acquisition of an interest in the Kimberley Mines, and we look forward to working with them to build upon their proven capabilities in tailings retreatment operations in Kimberley, as well as their strong local relationships.
“Together we are showing our commitment to shaping a new future for the diamond mining operations of Kimberley, to the benefit of our employees, shareholders and all stakeholders.”
Jahn Hohne, CEO of Ekapa Mining added that the company “could not wish” for a better partner than Petra.
Earlier this year it was announced that De Beers had put the mine on the market in an effort to extend the life of the mine.