Contact a diamond consultant

Contact
a diamond consultant

Our award winning diamond consultants help you select the best diamond jewellery for any budget.
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The 8 diamond guarantees

Royal Coster Diamonds is the best choice for a reason. Not only does our long and rich history tells you that you can trust your jewelry with us, Royal Coster wants to provide you with certainty in every area when you purchase something as valuable as a diamond. Therefore we’ve created Royal Coster Diamonds’ 8 diamond guarantees.

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8 diamond guarantees

#1 Royal Coster, 175 years of craftmaship

Royal Coster Diamonds was founded in 1840. Since then we created the most beautiful jewelry and polished some of the most valuable diamonds ever found. With over 175 years of extraordinary craftsmanship you can certainly trust us with your jewelry as well.

8 diamond guarantees

#2 Lifetime diamond upgrades

Royal Coster Diamonds loves to see a diamond ring passed on for generations. Therefore we reimburse 100% of the price you paid when you bought the ring if you want to upgrade the diamond in it.

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8 diamond guarantees

#3 Personal and honest advice

Diamonds come in different shapes, sizes, colours and quality. To select the perfect diamond that fits your personal taste Royal Coster Diamond has more than 150 diamond consultants who offer customized advice in over 27 languages.

8 diamond guarantees

#4 Knowledge is everything

Royal Coster Diamonds is well aware that purchasing diamond jewelry is a serious matter. In order to let you make an informed decision we give you a thorough insight in the 4 C’s of diamond valuation. At Coster Diamonds we want you to get the best value for your money!

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8 diamond guarantees

#5 Only the finest quality diamonds

Royal Coster Diamonds’ diamond polishers are considered to be the best in the business. Their passion for perfection and extraordinary craftsmanship turns every rough diamond into a beautiful piece of jewelry that lasts for centuries.

8 diamond guarantees

#6 Straight from the source

Royal Coster Diamonds has the largest stock of diamonds in Europe. We receive those rough diamonds straight from the source, no middleman is involved. That’s why we can offer you the best price for your diamonds.

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8 diamond guarantees

#7 Honest and responsible diamonds

At Royal Coster Diamonds we can trace all our purchased diamonds directly back to their source. This makes sure that we stay far away from conflict or ‘blood’ diamonds.

8 diamond guarantees

#8 Only the highest standard of Diamond certification

Royal Coster Diamonds has internationally acclaimed certifications for all its diamonds such as the HRD, IGI, GIA or Coster Diamonds.

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Coster Diamonds