British Prime Minister David Cameron has ruled out the return of the 105-carat Koh-i-Noor diamond to India.
His comments are in line with those made by his predecessors since India gained independence from Britain in 1947.
Cameron was speaking on the third day of a trade and investment visit to India.
The 105-carat Koh-i-Noor diamond, now on display in the Tower of London, is set in the crown of the late mother of Queen Elizabeth II.
Indian leaders have demanded that Britain return the giant diamond as a way of atoning for its colonial past.
Cameron, however, said there was no possibility of the diamond being returned. "I don't think that's the right approach," he told journalists in India.
"The right answer is for the British Museum and other cultural institutions to do exactly what they do, which is to link up with other institutions around the world to make sure that the things which we have and look after so well are properly shared with people around the world.
"I certainly don't believe in 'returnism', as it were. I don't think that's sensible."
Britain's Governor-General of India in 1850 arranged for the Koh-i-Noor diamond to be presented to Queen Victoria.