Royal Coster Diamonds is the oldest diamond polishing factory in the world. Founded in 1840, it still operates to this day, and has handled some of the most famous diamonds in the world ā including
Royal Coster Diamonds is the oldest diamond polishing factory in the world. Founded in 1840, it still operates to this day, and has handled some of the most famous diamonds in the world ā including the Koh i Noor.