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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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  • History of the Museumsquare - Royal Coster Diamonds

    History of the Museumsquare

    The Museum Square In the 17th Century In the 17th century there were windmills and farms on the spot that we now know as the Museum Square. The...

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  • The Three Amsterdam Crosses - Royal Coster Diamonds

    The Three Amsterdam Crosses

    About the Coat of Arms The Amsterdam crest was presumably implemented around 1280 by the city of Amsterdam. Over the years it has been a little modified. But overall it...

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  • Top 10 Museums in Amsterdam - Royal Coster Diamonds

    Top 10 Museums in Amsterdam

    1. Rijksmuseum Perhaps the most famous museums in the Netherlands. The Rijksmuseum in Amsterdam is one of the sixteen state museums in...

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  • Artis Zoo - Royal Coster Diamonds

    Artis Zoo

    Artis is the Royal Zoo of Amsterdam, it was opened in 1838. In 2015 it was chosen as the best zoo of the Benelux. At Artis you cannot only visit...

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  • The corridor of the Rijksmuseum - Royal Coster Diamonds

    The corridor of the Rijksmuseum

    Within a stone’s throw of Royal Coster Diamonds, is the Rijksmuseum. In the past few years, enough has been said already about the Rijksmuseum. But one of the small and...

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  • Amsterdam Squares - Royal Coster Diamonds

    Amsterdam Squares

    The city squares symbolize the whole areas of the city with their activity and the character. Big and open Dam square with the Palace of the King and the best...

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  • Winter in Amsterdam - Royal Coster Diamonds

    Winter in Amsterdam

    "It's the most wonderful time of the year..." Winter in Amsterdam always has something magical. And there is so much to do! Let's forget it is cold outside and discover...

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  • Discover the Vondelpark - Royal Coster Diamonds

    Discover the Vondelpark

    Looking for a piece of nature within the busy city? The Vondelpark is the “Central Park” of Amsterdam. Built in 1865 and still a beloved piece of outdoor for many...

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  • The 8 Best Shopping Streets in Amsterdam - Royal Coster Diamonds

    The 8 Best Shopping Streets in Amsterdam

    Some’s favorite activity in the world, other’s idea of a necessary evil: shopping! Whether you like shopping or simply just need to, you always hope to find the best shops...

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  • A Family Visit - Royal Coster Diamonds

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    Every day we welcome (new) customers to the Royal Coster Family. All our customers know: coming to Coster feels like coming home to your Amsterdam family. We take pride in...

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  • Top 8 Things To Do In Amsterdam At Night - Royal Coster Diamonds

    Top 8 Things To Do In Amsterdam At Night

    Planning a trip to Amsterdam? Of course, you want to make the most of your stay. There are plenty of historic sites, museums and other attractions to visit during the...

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  • Diamond Factories in Amsterdam - Royal Coster Diamonds

    Diamond Factories in Amsterdam

    Amsterdam has a rich history, and the history of the diamond factories is no exception. As one of the worlds most renowned and historic diamond centers, Amsterdam has a fascinating...

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  • Free things to do in Amsterdam - Royal Coster Diamonds

    Free things to do in Amsterdam

    When coming to Amsterdam, you want to get the most of it the few days that you are here. And who says having a good time has to be expensive?...

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  • 5 Places to Cool Off in Amsterdam - Royal Coster Diamonds

    5 Places to Cool Off in Amsterdam

    The last few weeks have been nothing but hot and sunny. You don’t hear me complain though. I like the sun. And besides, we have air condition here in our...

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  • Top 10 Romantic Activities for Valentine’s Day in Amsterdam - Royal Coster Diamonds

    Top 10 Romantic Activities for Valentine’s Day in Amsterdam

    Many lovers like to visit Amsterdam around Valentine’s Day. The historic city center with canals and characteristic houses create the perfect setting for a romantic getaway. However, you can make...

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