the noor-ul-ain is the principal diamond mounted in a tiara of the same name made for iranian empress farah pahlavi's wedding to shah mohammad reza pahlavi in 1958. the tiara was designed by harry winston. it is a modern design, featuring 324 pink, yellow, and white diamonds set in platinum. it is said to weigh around . the tiara forms part of the iranian crown jewels, held at the national treasury of iran in the central bank in tehran.