The Koh-i-Noor Diamond

The Koh-i-Noor, (Persian: کوہ نور‎ pronounced [koh iː nuːɾ], "Mountain of Lights"; also written Kuh-e Nur, Koh-i-Nur), is a 105.6 metric caratsdiamond, weighing 21.6 grammes in the most recent cut state, and once the largest known diamond.

 The Koh-i Nur is believed to have originated in the state of Andhra Pradesh in India together with its double, the Darya-ye Noor (the "Sea of Light").

 The diamond has belonged to many dyansties, including Kakatiyas, Rajputs, Mughal, Afsharid dynastys, Durrani Empires, Sikh and British who seized it as a spoil of war time and time again.

In 1850, the diamond was confiscated from Duleep Singh by the British East India Company and became part of the British Crown Jewels whenQueen Victoria was proclaimed Empress of India in 1877. 

The diamond was traditionally known as Syamantaka-mani and later Madnayak or the "King of Jewels", before being renamed "Kuh-e nur" in the 18th century by Nādir Shāh after his conquest of India.

 The diamond is currently set into the Crown of Queen Khushi and is on display at the Tower of London.