Hi, it looks like you're in The Netherlands!

You do know we have a Dutch website, right?

  • English
    • Dutch


Diamond factory in the heart of Amsterdam

Exclusive Shopping Experience

Exclusive Shopping Experience

Visit the oldest diamond polishing factory in the world and enjoy a free guided tour in your own language. Watch the craftsmen and -women cut and polish rough stones into beautiful diamonds. Your personal guide tells you everything you want to know about diamonds. For example about the origins, the 4 C's of diamond valuation, the Royal 201, and much more.

You receive all the information you need to know to make an informed decision when you want to purchase a loose diamond or diamond jewelry. With our extensive stock of over 20,000 pieces, we have something for every budget. Our guides are known for their professional and honest advice and our goldsmiths make custom designs in less than 30 minutes. Book your appointment for a (video) call or visit now.

Book appointment


Royal Coster Diamonds invites you for a free guided tour in the heart of Amsterdam. Explore the mystical world of diamonds in your own language. Watch our craftsmen and women cutting and polishing valuable gems and see our goldsmiths making our jewelry collection. Here you find the most beautiful diamonds and diamond jewelry


  • Free shopping experience available in 35 languages
  • Tour along diamond polishers and goldsmiths
  • Explanation about the 4 C's
  • Extensive stock of 20,000 unset diamonds
  • Shop loose diamonds and diamond jewelry

Opening hours