Polishing diamonds

Royal Coster Diamonds has been entrusted with polishing numerous famous diamonds. They were commissioned by Prince Albert of England to re-polish the fabulous "Koh-I-Noor" or the "Mountain of Light", a blue-white diamond which belongs to England's crown jewels and can be seen at the Tower of London.


Royal Coster Diamonds has one of Amsterdam’s largest collections of stones weighing more than 1.00 carat. The extensive collection includes both set and loose diamonds.


The majority of Royal Coster’s diamonds GIA or HRD certified. All items feature reasonable factory prices and tax-free shopping is available for non-E.U. residents.
You’ll also find a gift shop on the premises.


Royal Coster Diamonds is conveniently located in the centre of Amsterdam, right between the Rijksmuseum and the Van Gogh Museum.