Botswana is losing its shine. The diamond fuelled boom that made it one of Africa's richest nations is faltering. As lab grown gems eat into the market for natural diamonds.For more, we're joined by Bloomberg's Matthew Hill. Matthew. Well, you know, up until recently, Botswana has always been held up as an African success story.What has gone wrong Was the country simply too reliant on this single resource. That's a really important point. People have always pointed to Botswana as being an African country th ...