Queen Alexandra's Crown, 1902. The Koh-i-Noor diamond was set into Queen Alexandra's coronation crown, which also has 3,687 diamonds. It is said that Queen Alexandra chose the design of the crown which has eight half-arches in the continental tradition. According to legend, the Koh-i-Noor will bring bad luck to any male wearer and thus has been worn only by women since it came to Britain. Royal Collection Trust.