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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

What is an Alliance Ring and Which Different Types are There?

One of the most chosen wedding rings for women is the alliance ring. Besides the fact that these rings are stunning, there are more reasons why this design makes a popular wedding ring. An alliance ring is beautiful on its own. But it also lends itself perfectly as a ‘stacking ring’.

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Diamond Products

Fancy Colored Diamonds

Diamonds are one of the most sought-after and desired objects in the world. Considered their beauty, it is not a surprise that diamonds are so valuable. When diamond miners find the special stones, the diamonds have to be examined. Most diamonds are only suitable for industrial purposes. Only 5% of the diamonds we find are good for jewelry. An even smaller amount has a special color. We call these stones (sometimes) “fancy colored diamonds”. Let me explain what fancy colored diamonds are and what makes them so valuable.

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