3. Patrice Motsepe (Net worth $1.82 Billion)
Patrice Motsepe is the founder of African Rainbow Minerals and has had his hands mainly in mineral mining. The primary minerals they mine for are gold, ferrous metals, base metals and platinum. Having accumulated all this wealth he believed in giving back to the world and hence has been a member of The Giving Pledge and has committed to giving half his earnings to charities. He learned his basic principles of business and mining from the Spaza Shop owned by his parents and very popular among the then mine workers.