Darya-i-Nur Diamond is a rare blue diamond weighing about 186 carats. It was found in Golconda, India, and is one of the oldest diamonds in the world.
Darya-i-Nur is called Sea of Light in English, so it is also known as Sea of Light and River Light. Some scholars believe that this diamond and the "Nur-ul-Ain" may be the product of the re-cut of the famous Indian diamond "Great Table" (also known as the "Sea of Light", Darya-i-Nur).
The Light River Diamond, which originally belonged to Aurangzeb, the last emperor of the Mughal Empire in India, was plundered in the "sack of Delhi" in 1739.
This valuable jewellery has been changed many times. Former owners include: Nadir Shah Afshar, Shah Rokh, Mirza-Alam Khan Khozeime, Mohammad Hassan Khan Qajar, Lotf-Ali Khan Zand, Agha Mohammad Khan Qajar and Fath Ali Shah. Among them, Fath Ali Shah's name is also engraved on the side of the diamond.
This diamond is set on a very delicate base by Nasser-ed-Din, with a lion and sun logo on its top. In the end, the Kawa of Light Diamond appeared in the collection of the Iranian royal family with a size of 186 carats and 41.40 × 29.50 × 12.15mm.