Why Royal Coster Diamonds

We Go Beyond Expectations

The world’s oldest and most trusted diamond factory has a rich and compelling history. Royal Coster Diamonds is around for a long time, dating back all the way to at least 1840.

How Do We Do This?
Largest stock of loose diamonds in Europe
With 20.000 loose diamonds in stock, we have the biggest collection in Europe. If you’re looking for that one special diamond, we can probably provide you with it!

Our diamond jewelry is handmade inhouse
Our diamond polishers and goldsmiths polish and create the jewelry themselves. In their workshop they create the most fascinating and unique masterpieces.

Four monumental villas in the heart of Amsterdam
Discover something in every building! See how our craftsmen work on diamond jewelry and enter the world of diamonds in one of our luxurious showrooms.

 

What Does This Mean?

For every taste
Whatever style you prefer, you are in the right hands with us! From solitaire rings, to tennis bracelets and big statement pieces. We got it all. And if you still can’t find that perfect jewel? Our craftsmen can easily create a one-of-a-kind piece for you.

The most trusted jeweler
Since 1840 many customers have trusted the craftsmen of Royal Coster for their jewelry. Among which royals from all over the world, such as Empress Sisi, King Rama V of Thailand and the Viceroy of China. We work with the highest quality diamonds and our diamond polishers are known for their expertise.

Countless satisfied customers
At Royal Coster we don’t only sell diamonds and diamond jewelry, we create stories of happiness and love. We are proud and grateful to be a part of your love journey.

Royal Coster’s Royal visitors
We always shared a warm relationship with Royals. Not only the Royal House from the Netherlands, but Royal Houses from all over the world. Since our foundation in 1840, a lot of royals traveled to Amsterdam to trust us with their jewelry. They knew that Coster used an innovative way of cutting and polishing diamonds. To this day, our fantastic craftsmanship attracts royals and celebrities from all over the globe.

A special assignment
Normally, people come to us. But for Queen Victoria of England, we gladly made an exception. In 1852, two of our best diamond polishers went to London. They had the task to repolish the world famous Koh-i-Noor diamond. This is one of the most valuable diamonds around and part of the English Crown Jewels. Even today, it is one of the finest examples of craftsmanship in diamond history.

In the second half of the 19th century, the British Royal House wasn’t the only royal name trusting us with their jewelry. Among the royals we welcomed were Napoleon Bonaparte, Prince Victor Emanuel, and Empress Sisi. Our list of famous visitors is long and unique. Especially when you consider that traveling at the time was an expensive luxury. It was done seldom, which makes this royal list even more impressive.