Visit the oldest diamond factory in Amsterdam

Just a stone's throw away from the Rijksmuseum, you'll find the world's oldest operational diamond polishing factory. Here at Royal Coster Diamonds, you can delve into 185 years of skilled craftsmanship. During your tour, you'll traverse through genuine polishing rooms, observe live diamond polishers in action, and witness the transformation of rough diamonds into dazzling masterpieces. You'll also soak up the ambience of a factory where expertise has been handed down since 1840.You'll gain insight into the four key aspects of diamond valuation: cut, colour, clarity, and carat. You'll understand how each element influences a gemstone's quality and worth. As you journey through the factory, you'll uncover tales behind some of the globe’s most renowned diamonds. You'll admire a replica of the legendary Koh i Noor and learn about the Royal 201, hailed as the most radiant diamond in existence.From live demonstrations to regal history and extraordinary diamonds, this is one of the most distinctive experiences on Amsterdam’s Museumplein.