In the heart of Amsterdam, between the Rijksmuseum and the Van Gogh Museum, you find the oldest diamond polishing factory in the world. Royal Coster is the diamond polishing factory that helped Amsterdam become ‘the City of Diamonds’. Therefore, it’s the perfect place to learn about 400 years of diamond history, the valuation of diamonds and to discover amazing diamond pieces. To share our legacy, we have created some wonderful packages for anyone who’s looking for a sparkling experience in Amsterdam. Whatever your reason is to visit Amsterdam, we always have a sparkling activity that suits you.