It is believed that the first mention of Kohinoor was in a Hindu text in 1306. The problem is that no one knows the name of the text. Nor does anyone know who wrote it. The first written record of the mention of Kohinoor was in 1526. When the first Mughal emperor Zahirudin Babur came to India in 1526. In “Baburnama”, he had written that it is a diamond which is worth half the daily expense of the whole world. It is believed that he had won the Kohinoor diamond as a prize for winning a particular battle.
The second mention of Kohinoor was by Shah Jahan in 1628. When he commissioned his famous Peacock Throne. It took 7 years for this throne to be finished. And it was four times as expensive as the Taj Mahal. A large amount of precious stones and gems were used to make this throne, but of tnumbert precious gems one was the Kohinoor diamond, and the other was the Red Timur Ruby.
An interesting fact, the Kohinoor wasn’t the most precious gen owned by the Mughals. The Mughals prefered the Timur Ruby so that was the most valuable stone for them. Because the Mughals preferred the brightly coloured stones. On the other hand, the Hindu and Sikh kings, preferred diamonds. You can consider this as a personal preference. But despite that. the Kohinoor was given a prestigious place on the Peacock Throne, by making it the eye of the Peacock.