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Spring is coming
Time to update your jewelry for the next season

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Diamonds Since 1840

More facets, more sparkle, more fire!

Royal 201 Collection

Royal Coster Diamonds is famous for the highest level of craftsmanship for centuries. From this drive for perfection, the Royal 201 was born. Experts review the Royal 201 as the most beautiful diamond cut ever. Discover our selection of timeless classics with the sparkle that never ends.

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Diamond Jewelry

Diamond Engagement Rings
All Diamond Rings
Diamond Bracelets
Diamond Necklaces
Diamond Earrings
Diamond Watches

Book a Diamond Factory Tour

Our guided diamond factory tour is completely free of charge. We give free guided tours in more than 35 languages. Our guides tell you about our rich heritage. They explain how to evaluate a diamond and show you some amazing stones. So get your ticket today and discover the magical world of diamonds!

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Diamond Stories

Diamond Products

The Miriam Ring

Everyone who works for Coster knows that some of our rings wear a woman’s name. Many companies attach names to their products. But when we do it, there is always a story behind it. One of the rings with a name is the one we call “the Miriam Ring”.

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Knowledge

Surprising Diamond Facts

At Royal Coster Diamonds, we know a thing or two about these sparkling beauties. Of course, we all know natural diamonds are billions of years old. And they are from deep inside the earth. We know they consist of pressed and heated carbon. But sometimes we learn some fascinating facts about diamonds ourselves. Today, I want to share my most surprising diamond facts with you. How many of these did you know already?

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