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The basics The base of the brilliant cut diamond consists of the (Old) Single Cut diamond, or simple cut. The diamond is cut with seventeen facets. There are four cross...

The Royal Coster Passport explains our core values. These three values are: Flexible Family & Connection Dedication & Service ...

Book an exclusive diamond showing With the current travel limitations it might be difficult to visit Royal Coster Diamonds in person,...

Carat, color, clarity, and cut. These are the so-called 4...

Diamonds to express wealth - and magic This marvel of a shiny stone dazzles people since its discovery around 400 BC. It captured men and women alike with its magnificent...

1. Pearls Pearls are back with a vengeance! Anyone who says pearls are old-fashioned is wrong this time. It is an...

The basics The base of the brilliant cut diamond consists of the (Old) Single Cut diamond, or simple cut. The diamond is cut with seventeen facets. There are four cross...

History The development of this cut dates way back. This shape is almost 200 years old. The name, however, is quite modern. In the past, they called this shape the...

Get your jewellery examined, cleaned and brought back to its original glory Do you have old jewellery lying around that you love...

What is the difference between a necklace and a pendant? Necklaces and pendants go hand in hand, as they are mostly worn together. Yet technically they are two very different...

Bloodstone is a gemstone that already arouses interest by only hearing its name. This name was given due to the red spots that the stone usually has. Bloodstone dates back...

Easter is just around the corner. Usually, this is a time to spend time with friends and family. It’s a time to enjoy good food with good company. One of...

In 1951, diamond cutter Wim Biallosterski bought Coster Diamonds. It was a few years after World War II and the people of Amsterdam slowly started to get back on their...

Onyx is a versatile gemstone with a striking appearance. The onyx is best known for its black color. There are several other variants that we will tell you all about....

Moonstone is a fascinating gemstone. The gemstone has a beautiful shimmer over it. It is said to have a lot of powers. Moonstones would help with fertility problems, it gives...

A perfect polish Hearts and arrows is a certain way of diamond polishing. We can safely say: the perfectionist way of polishing. When a polisher makes a perfect round

Salt and Pepper As they say, better a diamond with a flaw than a pebble without. Even though inclusions are normally a no-go, Salt and Pepper diamonds are the...

Red carpet jewelry at the Oscars The Academy Awards, popularly known as the Oscars, are awards for artistic and technical merit in the film industry. It is the...

1.5-meter distance remains crucial In line with the RIVM guidelines, we only allow groups of a maximum of 2 people in. It will be possible there are several of these...

Where is Lapis Lazuli found? The Lapis Lazuli was found and mined in Turkestan, the current area of Kazakstan, Uzbekistan & Kyrgyzstan. The gemstone was cherished and found...

History of the baguette cut diamond The baguette cut diamond is about 100 years old. Named after the famous French bread, it was developed around the 1920s – 1930s. The...

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....

Diamond alternative engagement rings When you don’t want a diamond engagement ring, you can opt for different alternatives. There are engagement rings with gemstones, for example, red rubies, blue sapphires...