The Nassak Diamond (also known as the Nassac Diamond and the Eye of the Idol) is a large, diamond that originated as a larger 89 carat diamond in the 15th century in India. Found in the Amaragiri mine located in Mahbubnagar, Telangana, India, and originally cut in India, the diamond was the adornment in the Trimbakeshwar Shiva Temple, near Nashik, in the state of Maharashtra, India from at least 1500 to 1817. The British East India Company captured the diamond through the Third Anglo-Maratha War and sold it to British jewellers Rundell and Bridge in 1818. Rundell and Bridge recut the diamond in 1818, after which it made its way into the handle of the 1st Marquess of Westminster's dress sword.