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Discover all facets of diamond grinding and learn about the history of diamonds. Learn more about diamonds and admire the beautiful watches and jewelry of the world’s most exclusive brands. We also present our own unique, brilliant cut: the Gassan 121. Let yourself be enchanted by Gassan Diamonds!
The guided tour:
- takes about 40 minutes
- is given in more than 28+ languages
- can be taken between 9:00 and 17:00
- is offered seven days a week
- is completely free
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About the tour
Amsterdam has been known as the “City of Diamonds” for over 425 years. In the free diamond tour of Gassan Diamonds a guide will lead you through the ancient art of diamond polishing. You will get a glimpse into how a rough diamond is processed into a dazzling brilliant, and learn everything about determining the quality and value of the gems.
Book a free guided tour of the diamond polishing process and showrooms of Gassan Diamonds and discover the importance of the four C's of diamond polishing: carat, cut, clarity and color. The unique setting of our old diamond polishing mill gives the tour extra brilliance and cachet.Book now
Gassan Diamonds is an Amsterdam diamond manufacturer located at the former steam-powered diamond grinding factory on the Uilenburgergracht. In this monumental building we will gladly let you peek over the shoulders of our diamond grinders. A guide will give you an explanation of the diamond machining process.
The free guided tour of the grinding shop is a unique experience. At Gassan Diamonds you will experience what diamond grinding feels like and get a taste of over 425 years of craftsmanship and tradition.
During your visit to Gassan Diamonds you will have the opportunity to view a variety of diamonds from our impressive range in our showrooms. Of course you will find the world-famous “Amsterdam Cut” and our own cut shape: the Gassan 121. We are the only diamond manufacturer in the world to cut diamonds with 121 facets. And of course you can find a jewel in our Boutique that our goldsmiths can put together for you within 30 minutes: ideal as a gift for yourself or someone you love.
The fashionable jewellery collection Choices by DL is also being heralded.It is ‘a jewellery wardrobe in a box’. And for good reason: using a beautifully simple system, you can choose gold color preference and vary the stone colour you require, instantaneously.
If you’d like to reserve a guided tour of our diamond polishing shop, we recommend that you make an online booking. That way you can be sure that a guide in your language is available to take you on the tour at the time you want.
Amsterdam has been known worldwide as the “City of Diamonds” for 425 years. It is not without reason that the brilliantly polished Amsterdam shape is called the “Amsterdam cut” throughout the world. If you come to Amsterdam, a visit to Gassan Diamonds’ historic diamond polishing facility is a must.