The owner of one of the world’s most famous diamond mines could be about a decade away from clearing its multi-million-dollar debts, in a sign of the struggles facing an industry assailed by synthetic rivals and uncertain demand. Petra Diamonds bought Cullinan in 2008, aiming to breathe new life into the South African mine renowned for yielding the largest rough gem diamond ever found – 3 106 ct – and being the world’s main source of rare blue diamonds.
