Royal Coster Diamonds

Royal Coster Diamonds is one of Amsterdam's most storied diamond houses, operating from a grand premises near the Rijksmuseum in the museum quarter. Founded in 1840, the house built its reputation on exceptional craftsmanship and gained royal recognition when it was appointed to re-cut the Koh-i-Noor diamond for the British Crown in 1852, a commission that cemented its place in the history of fine gemstones.

Visitors today can step inside the workshops and witness the full journey of a diamond, from rough stone to finished jewel, guided by craftspeople who continue traditions refined over more than 180 years. The Royal Experience offers an immersive introduction to the art of diamond cutting and polishing, while the Royal Engagement Experience is tailored for couples seeking to understand and select stones for bespoke jewellery. Together, these experiences make Royal Coster Diamonds a distinctive destination in Amsterdam for anyone drawn to the craft and culture behind one of the world's most celebrated gemstones.