光之山

Also known as Kohinoor, Koh-i-Nur, Koh-i-noor

The is one of the largest cut diamonds in the world, weighing . It is currently set in the Crown of Queen Elizabeth the Queen Mother. The diamond originated in the Kollur mine in present day Andhra Pradesh, India. According to the colonial administrator Theo Metcalfe, there is "very meagre and imperfect" evidence of the early history of the Koh-i-Noor before the 1740s. There is no record of its original weight, but the earliest attested weight is 186 old carats (191 metric carats or 38.2 g). The first verifiable record of the diamond comes from a history by Muhammad Kazim Marvi of the 174