Royal Coster Diamonds is the world oldest diamond polishing factory in the world.
Since our inception in 1840, we have created the most beautiful diamond jewelry the world has ever seen. Throughout the years we became the choice of the Royals, such as Empress Sisi from Austria, King Rama V of Siam, Prince Napoleon and of course Queen Victoria of the United Kingdom for whom we repolished the Koh-I-Noor diamond.
Today we offer several experiences for almost 400.000 visitors every year such as the Free guided tour and the Royal Experience. Read more about our tours here.
But our main focus is still our craftsmanship. We offer polished diamonds and stunning diamond jewelry for every budget. Our most popular line is the Royal 201 collection. This collection consists of several diamond jewelry pieces which all have in common that they are set with our very own world-wide patented diamond cut: The Royal 201. Based on a regular brilliant, this diamond shape does not have 57 facets but -as the name suggests- 201 facets. The more symmetrical facets a diamond has the more the incoming light reflects internally before exploding out of the diamond leading to stronger reflection. As we like to say: more facets, more fire, more sparkle.