Koh Noor, weighing 105.6 carats (21.12 grams), is one of the largest cut diamonds in the world.  In the past, this diamond weighed 186.0625 carats equal to 37.21 grams, which was reduced in 1854.  Today, this diamond is on the crown of Elizabeth, the Queen Mother.  Koh Noor is the world's most famous priceless diamond

The diamond of Mount Noor, which was originally on the peacock throne, was brought to Iran by Nader Shah after the Iran-India war along with its pair, the Diamond of the Sea of ​​Light. After the death of Nader Shah, it was pulled from the throne and stolen