One of the most exceptional among the world renowned historical treasures is the repository of valuables of the olden shahs of Persia found in the Jewels Museum in Tehran. The outstanding jewel among those kept there is the diamond called Daryā-ye Nur, weighing about 182 carats. The history of this stone, according to the literature on the subject, starts in seventeenth century India, in the city of Golconda. Analysis of primary sources, however, allows for the supposition that this stone may have a longer history.