The Koh-i-Noor also spelled Kohinoor and Koh-i-Nur, is one of the largest cut diamonds in the world, weighing 105.6 carats (21.12 g). It is part of the British Crown Jewels.
Probably mined in Kollur Mine, in India, during the period of the Delhi Sultanate, there is no record of its original weight – but the earliest well-attested weight is 186 old carats (191 metric carats or 38.2 g). The diamond was part of the Mughal Peacock Throne. It changed hands between various factions in south and west Asia, until being ceded to Queen Victoria after the British annexation of Punjab in 1849.
Originally, the stone was of a similar cut to other Mughal-era diamonds, like the Darya-i-Noor, which are now in the Iranian Crown Jewels. In 1851, it went on display at the Great Exhibition in London, but the lackluster cut failed to impress viewers. Prince Albert, the husband of Queen Victoria, ordered it to be re-cut as an oval brilliant by Coster Diamonds. By modern standards, the culet is unusually broad, giving the impression of a black hole when the stone is viewed head-on; it is nevertheless regarded by gemologists as “full of life”.
Because its history involves a great deal of fighting between men, the Koh-i-Noor acquired a reputation within the British royal family for bringing bad luck to any man who wears it. Since arriving in the UK, it has only been worn by female members of the family.
Victoria wore the stone in a brooch and a circlet. After she died in 1901, it was set in the Crown of Queen Alexandra, wife of Edward VII. It was transferred to the Crown of Queen Mary in 1911, and finally to the crown of Queen Elizabeth in 1937 for her coronation as Queen consort.
Today, the diamond is on public display in the Jewel House at the Tower of London, where it is seen by millions of visitors each year. The governments of India, Pakistan, Iran, and Afghanistan have all claimed rightful ownership of the Koh-i-Noor and demanded its return ever since India gained independence from the UK in 1947. The British government insists the gem was obtained legally under the terms of the Last Treaty of Lahore and has rejected the claims.
