Coster Diamonds
Royal Coster Diamonds is the oldest, still operating, diamond polishing factory in the world, located in Amsterdam, Netherlands. Founded in 1840, they have handled a number of historical masterpieces. For example, they re-polished the Koh-i-Noor, which is mounted in the Crown of Queen Mary, and the Dresden Green Diamond, held in the New Green Vault at Dresden Castle. History 1840: Moses Elias Coster, diamond cutter in Amsterdam, founds Coster Diamonds in a factory building at the Waterlooplein in Amsterdam. 1848: Son Meijer Moses Coster (Martin) succeeds his father. He leaves for Paris for new business. 1910: Felix Theodoor Manus purchases Coster Diamonds from one of Coster’s inheritors. It becomes a company and remains so until the German occupation in 1940. 1945: After World War II, Wim Biallosterski, owner of a diamond sawing company, purchases the company Coster Diamonds. 1962: Ben Meier purchases the Coster premises together with partner Max Meents, Joop Schoos and Simon Cohen. 1970: The old diamond factory has to make way for the construction of the town hall (Stopera). Coster Diamonds moves to its current location at the Paulus Potterstraat at the famous Museum Square. 1995: The well-known diamond factory Van Moppes Diamonds was purchased by Coster