https://www.booksfact.com/history/kohinoor-diamond-owner-bhadrakali-goddess-warangal.html

Bhadrakali Amma of Warangal. 

Devi’s temple, which is situated on a hill between Hanamakonda & Warangal, was built in 625 CE by Pulakeshin II of Chalukya dynasty to celebrate his win over Vengi region of Andhra desha, as per an inscription inside the temple.  

The Kohinoor diamond originally belonged to Devi & was set as her eye (most likely Her third eye, alternatively Her left eye). It was during the 2nd attack on Warangal fort (1309) that Malik kafur, failing to get the fort, launched the deadliest attack on surrounding villages, when Prataprudra II of the Kakatiya dynasty was forced to offer the diamond as truce.

The Bhadrakali diamond (later named as Kohinoor by Nadir Shah), is believed to have come with a curse-“he who owns this diamond will own the world, but will also know all its misfortunes. Only God or woman can wear it with impunity.”

For 500 years after its removal from the Devi, the diamond moved between various Mongolian, Persian, Afghan, & Sikh rulers, who fought bitter & bloody wars to own it. Every king who was in possession of the diamond would ultimately lose power (if not die a horrible death).

After the British acquired it through thuggery & manipulation from Ranjit Singh’s minor heir, keeping in mind the curse, the diamond has only been worn by the Queens. 

Kohinoor which is now 105 carats, was originally much larger. Queen Victoria’s husband Prince Albert ordered it to be re-cut.