The worlds 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. Actually, Mr. Coster founded his company before that date, but we just cannot prove it. Therefore, we stick to what we do know. Let us tell you more about our eventful history. A few of our highlights are:
In 1852, our Master Polishers Fedder and Voorzanger wnt to London to repolish the Koh-I-Noor for Queen Victoria. This diamond is still the center stone in the Crown Jewels.
In 1852, our Master Polishers Fedder and Voorzanger wnt to London to repolish the Koh-I-Noor for Queen Victoria. This diamond is still the center stone in the Crown Jewels.
Presumably the first diamond from Brazil to receive international fame. We turned the rough diamond into the elegant oval form with its unique color scheme it is today.
Presumably the first diamond from Brazil to receive international fame. We turned the rough diamond into the elegant oval form with its unique color scheme it is today.
Our connection with the Dutch Royal House is one we treasure deeply. So when our late Queen Juliana celebrated her 50th birthday, we wanted to give her special.
Our connection with the Dutch Royal House is one we treasure deeply. So when our late Queen Juliana celebrated her 50th birthday, we wanted to give her special.
In 1862, King Willem III visited our diamond polishing factory. However, he was not ‘just another royal visitor. He and Martin Coster, were actually quite close. Dare we say: even friends?
Have you ever thought about the origin of a diamond? To learn more about its history we have to go back as far as the 4th century BC and dive deep into the earth.
For 400 years, Amsterdam is called the City of Diamonds. But the story of how Amsterdam became the diamond capital of the world, actually started over 600 years ago in Southern Europe.
In 2007 we opened our own Diamond Museum to share our passion for diamonds with the public. Let us take you on a journey of the diamond life cycle.
The day King Willem III set foot in our establishment in 1862, we could proudly call ourselves purveyor of jewelry to the Dutch royal household
The weight of a diamond is measured in carats. One carat equals 200 mg and 100 points. A diamond of 25 points is a quarter of a carat or 0.25 carats
The color of a diamond – or rather the lack of it – relates directly to a diamond’s value and quality. A diamond that consists of carbon only is pure white.
People around the world dream of owning at least one piece of diamond jewelry. But what is the attraction of that sparkling beauty?
The certificate is a report that proves that all of the 4 C’s are in place. It is a written document that guarantees the quality of the diamond.
