Coster Diamonds is one of the oldest still operating diamond polishing factories in Amsterdam. They were responsible for the creation of a few historical masterpieces, like the re-polishing of the Koh i Noor, mounted in the Crown of Queen Mary, to be admired in the Tower of London, amongst the other Crown Jewels of the United Kingdom and the Dresden Green Diamond, which belongs to the Saxon dynasty.

• Telefoon +(0)20 305 55 55
• E-mail info@costerdiamonds.com
• Adress Paulus Potterstraat 2-8, 1071 Amsterdam - Oud Zuid
• Website http://www.costerdiamonds.com