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Diamond Experience Tour

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Book our Diamond Experience Tour

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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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Gassan Diamonds

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27 Languages - Available for tour guidance

27 Languages

Available for tour guidance

Free Wifi - Throughout the facility

Free Wifi

Throughout the facility

Book online - See all your appointments

Book online

See all your appointments

Wheelchair Accessible - Facility is accessible by everyone

Wheelchair Accessible

Facility is accessible by everyone

About the tour

Diamond Experience 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.

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Diamond Experience Tour Diamond Experience Tour
Diamond cutting

Discover the brilliant art of diamond grinding

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.

Exclusive diamonds by Gassan

Admire our special and exclusive diamonds

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.

Choices by DL

Discover Choices by DL

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.

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Book your guided tour online

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.

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Amsterdam: City of Diamonds

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.

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