Engagement rings at Royal Coster Diamonds

As the largest engagement jeweler in the Netherlands, Royal Coster Diamonds offers an unrivaled collection of engagement rings and loose diamonds. With the largest loose diamond collection in the country, you have complete freedom to create a ring that matches your wishes, budget, and style.

Since 1840, we have guided customers through one of the most important choices of their lives. In our Boutique in Amsterdam, we combine expertise, personal guidance, and immediate availability.

 

Collections

Explore our exclusive engagement ring collection on our website
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Inspiration

Find all the inspiration you need for your upcoming engagement
Inspiration for your engagement

Themes

Discover more about the different themes within our engagement ring collection
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Royal Engagement Experience

A special moment deserves a special ring. Celebrate your love with a unique diamond experience for two.
The Royal Engagement Experience

Create your own engagement ring

At Royal Coster Diamonds, you create your engagement ring entirely yourself. You first select the diamond from our extensive collection of loose diamonds, sourced from the largest certifying institutes such as GIA and IGI. You then choose the ring setting in white gold, yellow gold, or rose gold.

Our diamond experts guide you personally at every step. They take the time to explain the differences between cut shapes, carat weight, and clarity, so you can make a well considered choice.

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The largest loose diamond collection in the Netherlands

Thanks to our exceptionally large stock of loose diamonds, you can compare and select immediately. From subtle diamonds to impressive sizes, all stones are directly available in our vaults. This means no long waiting times and no uncertainty.

You see the diamond with your own eyes and know exactly what you choose.

Engagement Rings

Signature C Ring

Solitaire Embalished

Halo Embelished

Solitaire

Solitaire

Signature C Ring

Ready within 30 minutes

Once you’ve made your final choice you can sit back, relax, and watch our highly qualified goldsmith working their magic. Within just 30 minutes, your diamond will be expertly set into your chosen setting. And while you wait, why not indulge in a glass of champagne? After all, this is a special moment.

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Personal guidance in a calm setting

You do not choose an engagement ring every day. That is why we offer a calm and discreet setting where you have all the space to ask questions and compare options. Our experts think along with you and provide honest advice, fully tailored to your situation.

Visit our Boutique in Amsterdam

You are welcome in our Boutique to view the collection and create your engagement ring. An appointment is possible, but we are also happy to assist you without an appointment.

Discover the largest engagement ring collection in the Netherlands today and create a ring that truly suits you.

 

Frequently asked questions

How much does an engagement ring cost?

That depends on the diamond and the setting. A diamond’s value is determined by the 4 Cs: carat, colour, clarity and cut. At Royal Coster, engagement rings start from €850. For reference: in the Netherlands, people spend an average of €1,000 to €2,000 on an engagement ring.

Can I design my own engagement ring?

Yes. At Royal Coster, you first choose a loose diamond, certified by institutes such as GIA and IGI, and then a setting in white gold, yellow gold or rose gold. A diamond expert guides you through every step. Once you’ve made your choice, our goldsmiths set the diamond in the ring within about 30 minutes.

How can I find out my partner’s ring size without them noticing?

Secretly borrow a ring they wear on the same finger and have it measured at the Boutique. Or ask a friend or family member for help. Not sure? Then go slightly larger rather than too small, so the ring will at least fit on the finger during the proposal. Ask in advance about the options for adjusting the size later.

When is the right time to buy an engagement ring?

For custom-made rings or orders, allow a delivery time of a few weeks. So plan well ahead, especially around Christmas and Valentine’s Day. Choosing a diamond from stock in the store? Then you can sometimes take the ring home the same day. Royal Coster keeps all its loose diamonds in stock in its own vaults.

How do I keep my gold engagement ring looking beautiful?

Clean your ring occasionally in lukewarm water with a drop of mild soap and a soft brush. Take it off when exercising, cleaning and swimming; chlorine and cleaning products damage gold. Have the setting checked once a year so the diamond stays securely in place. White gold also needs a new rhodium coating from time to time.

Does my engagement ring have to be the same gold colour as my wedding ring?

No, it doesn’t. Matching colours create a calm, harmonious look. Combining different gold colours is actually popular and gives the rings a personal character. Wearing both rings on the same finger? Then pay particular attention to the shape. A wedding ring that fits well against the engagement ring prevents the rings from rubbing against each other.

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