Back in august FORBES detailed how the richest woman in Africa, by the tender age of 40, had increased her net worth from zero to $3 billion: You have your father, the president of Angola, direct those who want to do business in the country to cut you in on their action. FORBES has learned, however, that Isabel dos Santos has added a more legitimate jewel to her crown: de Grisogono, a Swiss jeweler renowned among the Hollywood A-list for its extravagant, celebrity-studded parties in Cannes and Miami Beach and fans like Heidi Klum and Sharon Stone.
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