It was once the world's largest known diamond, is worth a reported ?100m and is currently part of Britain's crown jewels.
But India wants it back.
Bollywood stars and businessmen have united to instruct lawyers to begin legal proceedings in London?s High Court to return the Koh-i-Noor diamond.
The group, which has called itself the ?Mountain of Light? after the translation of the stone?s name, say that the 105-carat diamond was stolen from its true home in India and are demanding that the UK Government returns it.
The stone is ?one of the many artefacts taken from India under dubious circumstances?, according to David de Souza from the Indian leisure group Tito?s.
Souza claims the British colonisation of India had stolen wealth and ?destroyed the country?s psyche?.
The jewel was given to the reigning Queen of the time by the last ruler of the Sikhs, Duleep Singh, after the British annexe of the Punjab.
Bollywood star Bhumicka Singh, also part of the group, said: ?The Koh-i-noor is not just a 105-carat stone, but part of our history and culture and should undoubtedly be returned.?
British Lawyers instructed by the ?Mountain of Light? group to seek the stone's return, said they would base their case on the Holocaust (Return of Cultural Objects) Act, which gives national institutions in the UK the power to return stolen art.
Satish Jakhu, of Birmingham-based law firm Rubric Lois King, said they would make their claim under the common law doctrine of ?trespass to goods?, arguing that the government had stolen the diamond. He added that they would be taking their case to the International Court of Justice.
http://www.independent.co.uk/news/uk/home-news/india-sues-the-queen-for-return-of-stolen-100m-koh-i-noor-diamond-a6725951.html 
