I'll keep correcting this when I see it. There was no Musk-owned, South African Apartheid emerald mine.
It was a mine in Zambia. A completely different exploited African nation. And Musk was only about to afford it because, as a wealthy white man in South Africa benefiting from Apartheid, he had a private plane that he traded for a share in the mine.
The "self-made" man got rich because of colonial exploitation in two African nations. Not just the one.