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Discover the world's oldest diamond polishing factory with a private, 50-minute guided tour in Amsterdam, including insights into diamond valuation and a sparkling goody bag.

For those fascinated by the sparkle of diamonds and the craftsmanship behind their brilliance, the Royal Coster Diamond offers an exclusive glimpse into this glittering world. Priced at just $26.12 per person, this private tour lasts between 50 minutes and 1 hour, providing a personalized experience that reveals the secrets of diamond polishing and jewelry making in Amsterdam. Located conveniently at Paulus Potterstraat 2, the tour is accessible via nearby public transportation, making it an easy addition to any city itinerary.
What truly sets this tour apart is its focus on personalized attention. Unlike group visits, this private experience allows for tailored interaction with expert guides who explain the entire diamond process—from the origin of diamonds to evaluating them with the 4 C’s (carat, cut, clarity, color). The tour is especially suitable for those who seek an in-depth understanding of the craftsmanship involved, even if they do not plan to buy.
While the experience includes all taxes, fees, and a sparkling goody bag, it does not cover transportation, food, drinks, or hotel pickup. Still, a clear advantage is that you will see Europe’s largest collection of unset diamonds and the Royal 201 diamond, a unique patented cut. The 50-minute duration makes it a quick yet informative addition to your Amsterdam visit.
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The Royal Coster Diamonds has a legacy of tending to the jewels of monarchs around the globe. As the oldest diamond polishing factory in the world, it combines centuries of craftsmanship with modern techniques. The guide explains how diamonds are shaped from millions of years of natural formation into stunning jewelry pieces, highlighting Amsterdam’s reputation as the City of Diamonds.
This history adds a layer of prestige to the visit, making it more than just a demonstration. It’s a chance to appreciate the legacy of royal jewelers and see rare diamonds up close. The fact that the factory has tended to royal jewels underscores the high standards upheld in the polishing process.

One of the most engaging parts of this tour is the opportunity to see professional diamond polishers and goldsmiths in action. The guides lead you through the process, explaining each step involved in transforming raw stones into brilliant gems. This behind-the-scenes glimpse is both educational and visually impressive, especially when observing the precision and skill required.
The factory setting offers a genuine atmosphere where craftsmanship is evident. Witnessing the cutting and polishing process firsthand leaves a lasting impression, emphasizing that diamonds are much more than their sparkle; they are the result of meticulous labor and expertise.
A highlight of the tour is the detailed explanation of how to evaluate a diamond using the 4 C’s—carat, cut, clarity, and color. This knowledge demystifies the diamond grading process and enhances appreciation for the quality and value of each stone.
The guide elaborates on what makes a diamond exceptional and how each of these factors influences price and beauty. This educational aspect turns what could be a superficial glance into a meaningful understanding of what makes a diamond truly special.
Visitors get rare access to Europe’s largest collection of unset diamonds, offering a close-up view of various cuts, sizes, and colors. This collection showcases the diversity of diamonds and allows for direct comparison of different stones, which is especially appealing for enthusiasts.
In addition, the Royal 201 diamond stands out as a patented cut, recognized for its exceptional craftsmanship. Seeing this unique gemstone emphasizes the factory’s innovative approach and commitment to excellence in diamond cutting.

The tour includes a sparkling goody bag, adding a fun and tangible keepsake of the experience. The professional guide ensures that all your questions are answered, providing insights into the history and process behind the craftsmanship.
Since the tour is private, the experience feels more intimate, allowing for customized explanations and personal attention. The all taxes and fees are covered, providing transparency in pricing.
The tour begins at Royal Coster Diamonds at Paulus Potterstraat 2 in Amsterdam. It explicitly states that the activity ends back at the same location, making logistics straightforward. The tour is not accessible for people with walking difficulties, so travelers with mobility issues should consider this.
While the guide may operate in multiple languages, English guides are guaranteed, ensuring clear communication. Since the tour is private, only your group participates, making it a personalized experience.
The experience is primarily educational, but some reviews suggest that certain guides may focus more on selling diamonds rather than providing the in-depth tour promised. It is advised to manage expectations if opting for a truly educational visit rather than a sales pitch.
Plus, the tour does not include transportation, food, drinks, or hotel pickup. It’s recommended to arrive prepared for a short walking tour and to consider nearby attractions if you want to extend your visit.
The free cancellation policy allows travelers to cancel up to 24 hours in advance for a full refund. This flexibility helps accommodate changes in travel plans, especially if unforeseen circumstances arise.
This private tour of the Royal Coster Diamonds offers a balanced mix of history, craftsmanship, and education. The affordable price point combined with the personalized experience makes it a compelling choice for anyone interested in diamonds or jewelry making.
While some reviews highlight variability in guide quality, the overall 4.5/5 rating reflects strong satisfaction. The tour is especially ideal for diamond enthusiasts, those curious about the process behind luxury jewelry, or visitors seeking a unique, intimate experience in Amsterdam.
In summary, Royal Coster Diamonds delivers a concise and insightful glimpse into the world of diamond polishing, emphasizing craftsmanship, history, and innovation. It’s a memorable attraction that enriches the understanding of the jewel’s journey from rough stone to radiant gem.
“I was surprised that we had a private tour. It made it more special for our mother. The staff was both charming and knowledgeable.”
Is this tour suitable for children or those with mobility issues?
The tour is accessible for most, but it is not suitable for people with walking difficulties. It’s recommended for those who can comfortably walk and stand for the duration.
How long does the tour last?
The tour lasts approximately 50 minutes to 1 hour.
What is included in the price?
The ticket price includes a professional guide, sparkling goody bag, and all taxes and fees.
Can I buy diamonds during the tour?
While purchasing diamonds is not mandatory, the tour includes a sales area. Some reviews indicate that the experience can be focused on sales, so it’s best to approach with clear expectations.
Is the tour available in languages other than English?
Guides may operate in multiple languages, but English is always guaranteed.
How far in advance should I book?
The tour is generally booked about 32 days in advance, so early reservation is recommended.
What are the cancellation policies?
You can cancel free of charge up to 24 hours before the tour for a full refund.
Where does the tour start and end?
The activity begins and ends at Royal Coster Diamonds, Paulus Potterstraat 2.
Does the tour include transportation?
No, transportation to and from the factory is not included.
What makes this tour different from other diamond experiences in Amsterdam?
Its private, personalized format and the opportunity to see Europe’s largest collection of unset diamonds distinguish it, along with its long history of royal clientele.