Schwartz Jewellers is a diamond wholesaler and manufacturing jeweler. It offers a large range of classical and ethnic African pieces and a custom-design service. You can also take a one-hour tour of its workshops in Sandton by appointment. You can see stone grading, diamond setting, and gold pouring, plus get tips on what to look for when buying diamonds, as well as a brief history of South Africa's diamond industry. And, of course, you can buy the finished product. Tours are free and include refreshments; you need your passport for security reasons.
Nelson Mandela Sq., Shop L3, on the bridge, Johannesburg, 2196, South Africa