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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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This is Sparkling Holland

Come in for a Royal Experience at Royal Coster Diamonds. Visit the four monumental 19th-century villa's and see how craftsmen create beauty that lasts for centuries. Enjoy a private guided tour during which your guide vividly tells you about the history of these precious stones and how Amsterdam became the City of Diamonds. You dive into the rich legacy that is filled with Royal Stories. Your guide explains how diamonds are formed and polished, while you see our polishers and goldsmiths up close.

Combine your visit to Royal Coster with This is Holland. When you book your ticket for the Royal Experience, you receive a voucher for This is Holland. Flying like a bird, you get an overview of how the Netherlands was created. You learn about the people who weren’t deterred by all the water. Using mounds, dikes, windmills and polders, they succeeded in reclaiming land from the sea, creating this extraordinary country below sea level.

What do you get?

- Personal Guided Tour

- Explanation about the 4 C's of diamonds

- Learn about the diamond history of Amsterdam

- See real loose diamonds in all shapes and sizes

- See famous diamond artefacts like the Koh-I-Noor

- See the Royal 201 Patented Collection

Experience the sparkle of Holland

learn the craft of diamond polishing
free diamond tour & workshops

visit royal coster

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