The Kohinoor is India’s most famous diamond. It is the stuff of legends, that has fired both ambition and imagination, in equal measure. But take a trip to Tehran and you will be able to see another, even more spectacular diamond the Darya-i-Noor. Stored in the vaults of the Central Bank of Iran , this diamond which is the largest pink diamond in the world, is far more valuable than the Kohinoor. It too has its origins in India. What’s more, while the illustrious Kohinoor is just 105 carats, the lesser-known Darya-i-Noor is 186 carats. Almost double the size!