The Turban Trick and the Naming of the Koh-i-Noor Diamond
During the conquest of Delhi by the Shah of Persia, Nadar, in 1739, the Koh-i-Noor diamond came into the possession of the conqueror through a ruse. He is said to have found out from a harem lady that the Indian ruler Muhammed Shah was hiding the gem in his turban. In this way, he made use of an old oriental tradition according to which exchanging turbans is a sign of friendship and peace. Muhammed Shah could not possibly refuse this gesture.
When the Persian Shah Nadar later found the diamond in the captured turban, he is said to have exclaimed “Koh-i-Noor”, which means “mountain of light” in Persian – hence the name of the gemstone.