Royal Coster Diamonds is the oldest diamond polishing factory in the world. Since our establishment in 1840, Royals from all over the world came to Amsterdam to see our Amsterdam craftsmanship. We’ve welcomed visitors like Empress Sisi, the Viceroy of China, King Rama V, Prince Napoleon and many, many more.
Today this Royal experience is within your reach. Visit our four monumental 17th century villa's and see how we create beauty that lasts for centuries. We give private guided tours during which your guide vividly tells you about the history of these precious stones and how Amsterdam became the City of Diamonds. You dive into our rich legacy that is filled with Royal Stories. Your guide explains how diamonds are created and polished, while you see our polishers and goldsmiths up close. You can take a picture of yourself behind a real diamond polishing table and you learn how to analyze a diamond and why some diamonds sparkle more than others. At the end of the tour, you receive a nice goody bag you can use to value your or your family’s diamonds and diamond jewelry.
Experience diamonds like the Royals did during our Royal Experience. See diamond polishers and goldsmiths at work while your personal guide explains the origin of diamonds and shows you why we are the number 1 choice for high quality diamonds and diamond jewelry.
Our guided diamond factory tour is completely free of charge. Just visit us at the Museum Square and walk in whenever you want! We give free guided tours in more than 35 languages. No need to make a reservation, just walk in, every day of the week.
If you are looking for a sparkling exciting addition to any event; the Champagne Surprise is perfect for you. Every guest gets a glass of champagne with a little sparkling stone inside. But is it a real diamond or a fake one?
Our diamond polishers will check each stone closely with a diamond loupe and reveal who is the lucky winner.
Our engagement workshop is for couples who are preparing for an engagement or anniversary and want to learn more about diamonds before they purchase. Make buying your engagement ring as an unforgettable experience.