Updated for 2026: Gassan remains a popular stop for travelers who want a polished introduction to Amsterdam's diamond trade. Check current tour times on the official site or on arrival, as schedules and visitor procedures can change.
Gassan Diamonds is a family-run Amsterdam company whose story began in 1945, when Samuel Gassan opened a small diamond workshop in the city. The business later grew under the next generation and earned an international reputation for precision cutting and fine jewelry.
The factory and showroom sit on Nieuwe Uilenburgerstraat, in a historic building dating to 1879, just east of central Amsterdam. Today, the company employs hundreds of people, from skilled cutters and polishers to showroom staff and guides.
Visitors can join a free tour to see how diamonds are cut and polished, learn what sets one stone apart from another, and get a clearer sense of how experts judge quality and clarity.
After the tour, you can browse a glittering display of loose diamonds, exclusive jewelry, watches, and other luxury accessories. You do not need to be planning a purchase to enjoy the visit - the craftsmanship alone makes it memorable.
