Lifetime free cleaning and polishing service.

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Find Your Ring Size

Royal Coster
Diamonds Size
MM / INCH (Circumference)
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

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Luxury Shopping Experience

- A tour of our polishing area

- Explanation of everything you want to know about diamonds

- Personal, honest and expert advice

- A diamond expert who really takes the time for you

- Choose from a collection of more than 20,000 diamonds

- A glass of champagne upon arrival

Luxury Shopping Experience

During our Luxury Shopping Experience, you will be completely pampered. Choosing a diamond is a special occasion. While enjoying a glass of champagne, one of our diamond consultants will take you through all the ins and outs involved in choosing the perfect diamond.

You will see how our craftsmen and -women cut and polish rough stones into beautiful diamonds and set them in jewelry. You will receive all the information you need to make an informed decision when you want to buy loose diamonds or diamond jewelry. With our extensive collection of more than 20,000 pieces, we have something for every budget. Our guides are known for their professional and honest advice and our goldsmiths create custom designs in less than 30 minutes.

With more than 180 years of experience, we have successfully guided thousands of customers in their search for beautiful jewelry.

Experience Luxury Shopping in the heart of amsterdam

free diamond tour & workshops

visit royal coster

Book an experience and learn about our heritage or visit us to see more diamonds & jewelry