About Royal Coster Diamonds

Royal Coster Diamonds is the oldest diamond polishing house in the world and has a particularly rich history. The Amsterdam based diamond house is known for its craftsmanship, passion, a large stock of high-quality diamonds and their personal approach.

We supply customers all over the world, including royal houses, and have acquired the Royal certificate thanks to our contribution to the development of the profession of diamond polisher. Our rich history, craftsmanship, high quality standards and the fact that we can make everything to measure means that Royal Coster Diamonds is seen by many jewelry connoisseurs and enthusiasts as one of the most respected diamond houses in the world.

We bring you into the fascinating world of diamonds.

Our patented diamonds are exclusively sold in Amsterdam. Not to be elitist, but because we want to help our customers as best as possible in finding the right diamond(s). And that is exactly what Royal Coster is all about: we want to take you along in the world of diamonds, so that you can make the right choice. That is why we have our own diamond polishers and goldsmiths in-house and one of the largest diamond stocks in Europe. You choose a diamond for life, choosing it is a beautiful and special moment. That is why it is important that it comes to life, that it sparks a special feeling. We help our customers make the right decision not only rationally, but also emotionally.