Christo Wiese returns to diamond-hunting roots in hopes of finding the 'big one'

Christo Wiese, South Africa’s billionaire retail king, is going back to the future.

The 82-year-old serial investor, who steered the expansion of both Africa’s biggest clothing retailer and the continent’s largest grocer, has dived into something that harkens back to the start of his storied career nearly half a century ago: diamonds. 

"I’ve always been fascinated by diamonds because it’s that amazing industry where you plod along and then one day stumble on a big stone that can change your whole life," Wiese said over lunch at the summer-green vineyards of Beau Constantia, a wine farm in Cape Town. "This stretch of the Atlantic Ocean produces some of the world’s highest-quality diamonds."