The Kohinoor diamond was obtained by the British Empire. Some argue it should be returned to India.

quot;It has a history of being part of war booty or trophies taken as the result of war in South Asia. So in a lot of ways, it is a symbol of plunder and represents the long history of plunder imperialism,” a history professor said.
After the death of Queen Elizabeth II last week, online users are calling for the British government to surrender artifacts obtained by the British Empire,
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With passing away of Queen Elizabeth II, twitterati demands Kohinoor's return to India

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Royals could dust off a 200-year-old coronet to crown Camilla and avoid Koh-i-Noor row

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Why is the world fighting over Queen Elizabeth's royal jewels? From Koh-i-noor on queen mother's crown to South Africa's Cullinan diamonds on the Sovereign's Sceptre and Imperial State Crown …