If diamond is the hardest stone there is, how do you cut it into a beautiful shiny jewel? With diamond (powder)! Amsterdam was and is a real diamond city. Everywhere in the old Jewish quarter there were large and smaller polishing factories and shops where the most beautiful jewelry was sold. At Gassan Diamonds, which is located in a former Boas steam-powered polishing factory, you will learn everything about the discovery of the valuable stones and polishing of the diamonds. The most beautiful rings and watches are also on display. I’m sure your parents can make each other very happy with this. Maybe with a ring with the Amsterdam Cut or Gassan’s own 121 Cut.