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Have you always dreamed of creating your own diamond jewelry? At Royal Coster Diamonds, we make this possible with our concept called 'Coster Creations'. Our team of diamond experts is ready to guide you every step of the way to create your perfect match.
Welcome to our house of diamonds
As the oldest diamond cutting factory in the world, we have goldsmiths and diamond polishers working in our house of diamonds
At Royal Coster Diamonds, we work exclusively with natural diamonds of the highest quality. Each diamond is carefully selected, cut, and evaluated with the utmost precision by our experts in Amsterdam. Our diamonds are certified by the world’s leading independent institutes, including GIA, IGI, and HDR, ensuring their authenticity, origin, and quality.
Whether you are looking for an engagement ring, a unique piece of jewelry, or a loose diamond, you can be certain of an authentic and lasting creation that will be cherished for generations. Discover our collection of natural diamonds and experience the craftsmanship and heritage that have distinguished Royal Coster Diamonds worldwide since 1840.
We believe that true beauty begins with responsibility. That is why we work exclusively with ethically sourced, natural diamonds from verified and conflict-free origins. Through our collaboration with the world’s leading certification institutes – GIA, IGI, and HDR – we ensure that each diamond’s origin, quality, and authenticity are fully traceable and verifiable.
Our mission is to unite the timeless art of diamond cutting with the values of today: sustainability, transparency, and respect for people and the planet. In doing so, we contribute to a future where luxury and ethics go hand in hand.
