The Koh-i-Noor, also spelt Koh-e-Noor, Kohinoor and Koh-i-Nur, is one of the largest cut diamonds in the world, weighing 105.6 carats. It is part of the Crown Jewels of the United Kingdom. The diamond is currently set in the Crown of Queen Elizabeth The Queen Mother.
There are multiple conflicting legends on the origin of the diamond. From Wikipedia
