Locked in the Jewel House at the Tower of London sits a diamond said to bring catastrophic bad luck to any man who wears it, a stone that survived cholera outbreaks, a twelve-hour gale and a wartime biscuit tin, and that four countries are actively demanding back. This episode treats the Koh-i-Noor as the subject of an unauthorized biography, tracing its verified journey from the Mughal Peacock Throne in Delhi to a heavily contested British crown jewel.

We begin with the unverifiable legends, then pick up the documented trail in the 1740s: Nader Shah’s invasion, the turban swap that gave the stone its name, its passage to Shah Shuja and then Ranjit Singh of the Sikh Empire, the convoy of forty identical camels, and the 1849 Treaty of Lahore signed by an eleven-year-old Duleep Singh. From there we follow the waistcoat-in-the-laundry near disaster, the cursed voyage aboard HMS Medea, the underwhelmed crowds at the Great Exhibition, the 38-day recutting that ground away nearly half its mass, and its burial beneath Windsor Castle during World War II. We close with the competing modern claims from India, Pakistan, Afghanistan and the United Kingdom.

• Why the diamond was almost never bought or sold, only taken by force or coercion
• How Ranjit Singh used the stone as a geopolitical prop for visiting East India Company officers
• The Great Exhibition disappointment and the Punch magazine jibe about the Mountain of Darkness
• The steam-powered recutting from 186 carats to 105.6 and Duleep Singh’s silent reaction
• Four national claims, a retracted Indian court statement, and the British Museum slippery-slope argument