Levenslange gratis reinig en polijst service.

Gratis verzekerde verzending in Europa. 

Uw winkelwagen

Uw winkelwagen is leeg

Bekijk deze collecties.

Vindt je ringmaat

Royal Coster Diamonds Maat MM / INCH (Omtrek)
48 / 1.89 48 4½ 8
49 / 1.93 49 9
50 / 1.97 50 K 10
51 / 2.01 51 L 11
52 / 2.05 52 6 12
53 / 2.09 53 13
54 / 2.13 54 14
55 / 2.17 55 O 15
56 / 2.20 56 P 16
57 / 2.24 57 8 17
58 / 2.28 58 18
59 / 2.31 59 R 19
60 / 2.36 60 9 S 20

Ontdek je ringmaat

Ontdek je ringmaat Meet je vinger

Uw aanvraag

Uw aanvraag




Waarom Royal Coster

We gaan boven verwachting

De oudste en meest vertrouwde diamantfabriek ter wereld heeft een rijke en boeiende geschiedenis. Royal Coster Diamonds bestaat al heel lang en gaat terug tot minstens 1840.

Onze kernwaarden

Aandacht voor detail




Uitzonderlijk Service

Koninklijke behandeling

hoe doen we dit?

Grootste voorraad losse diamanten in Europa

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!

Onze diamanten sieraden zijn handgemaakt in eigen huis

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

Vier monumentale villa's in hartje 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.

Wat betekent dit?

Voor elke smaak

Whatever style you prefer, you are in the right hands with us! From solitaire rings, to tennis bracelets and big statements 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.

De meest vertrouwde juwelier

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.

Talloze tevreden klanten

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.

Wat krijg je?

Levenslange service

All jewels that have been bought with us deserve the best care possible. Is there a problem with your jewel or did it lose its sparkle? You are always welcome to visit us and together we will make sure you’ll leave as a happy customer with a sparkling bright jewel, as it’s supposed to!

Wereldwijde levering

From Amsterdam to anywhere in the world! We will do anything to make sure that your beloved jewel will end upon your finger, no matter where you are.

14 dagen retourbeleid.

Are you unsure about your purchase? All our jewels have a 14 day returns policy. This also includes custom made jewelry or jewelry that was personalized.

royal experience Royal Coster Diamonds, diamond tour, diamond factory

Bezoek royal coster

Boek een ervaring en leer over ons erfgoed of bezoek ons ​​om meer diamanten en sieraden te zien