Royal Coster Diamonds invites you to visit us in the heart of Amsterdam for a free guided tour through the mystical world of diamonds in your own language. Watch our craftsmen and women cut and polish rough stones into beautiful diamonds in all shapes and sized that will last for centuries to come. Let our experienced guides explain about the 4 C’s of diamond valuation, the origin of diamonds and much more while you gaze upon some of the world’s most spectacular diamond artifacts. When you arrive at Royal Coster Diamonds to start your tour, you will receive a free e-book. You can use this e-book during the tour or read it after the tour to learn even more about diamonds.
Let our experienced tour guides explain everything you want to know about the mystical world of diamonds. They will tell you about the origins of the diamonds and the process a diamond goes through –which takes millions of years– all the way up to the 4 C’s (carat, cut, clarity, color) valuation. There is so much more to know and appreciate about a diamond than just the sparkle. You will be surprised.
Ready to see the real thing? At Royal Coster Diamonds we have the largest collection unset diamonds in Europe. Whatever your diamond needs are, we can fulfill them to complete satisfaction. From polished to rough, from 0,10 carat to 5+ carat, we have diamonds in all shapes and colors. You can see and purchase them right here, right now, in the heart of Amsterdam, the City of Diamonds.
In 1853 Queen Elizabeth called upon Royal Coster Diamonds to repolish the famous the Koh-I-Noor Diamond. This was the largest diamond ever found and it’s name means ‘Mountain of Light’. Once you see the Crown at our polishing area, you will understand why the stone was named like that. It is on display and the centerpiece of a large collection of famous diamonds we have on display, such as the Cullinan diamond, the Rembrandt and many, many more.
Besides seeing amazing diamond jewelry and the largest collection of unset diamonds in europe, you will also see the patented Royal 201 diamond. A regular brilliant has 57 facets, while our unique diamond cut has no less than 201 facets. This means that light will reflect even more within the diamond creating a sparkling effect that is no match for any other diamond shape in the world.
We have been in business for more than 175 years and build up a reputable list of customers around the globe. The only thing our clients have in common is that they only want the best quality for the best price. One of the bigger benefits of visiting a diamond polishing factory is that you can purchase diamonds straight from the source, keeping the quality higher and the cost better than regular diamond retailers. If you visit us from outside the European Union we can offer you a tax refund on your purchase.