Hans Stern started his gem empire in 1945 with an initial investment of about $200. Today his company's interests include mining and production operations, as well as stores in Europe, the Americas, and the Middle East. The world headquarters of H.Stern contains a small museum that exhibits rare gems. On the self-guided workshop tour you'll learn about the entire process of cutting, polishing, and setting stones. Afterward, you get a personal consultation with a salesperson, although you should not feel obliged to buy. The museum can arrange free transport to and from your hotel.