May 6th will see the historic coronation of King Charles III as the new monarch of England, and one of the controversies surrounding this event is that Camilla will also be crowned Queen Consort.

After becoming persona non grata in the royal family, the 75-year-old will wear the crown of Mary of Teck, albeit with a few notable alterations to replace the fearsome Koh-i-Noor diamond.

The precious stone is part of the other 2,200 diamonds that the dress has, since Queen Mary had it made for the coronation of her husband, King George V, in 1911.

The diamond that Camilla refused to wear and her dark past

The gem is unique in its kind, shaped like a small egg and adorning the front of the crown which is usually displayed in the Tower of London, besides, its distinctive name means “Mountain of Light” in Persian.

These are the five stages of the coronation ceremony of Carlos III

The 105.6-carat diamond is said to carry a curse indicating that whoever owns it “will rule the world, but will also know all its misfortunes. Only God or a woman can take it with impunity.”

This comes from the Kollur mine in India and was said to have been kept in a temple before it was stolen and belonged to Hindu, Mughal, Persian and Afghan nobles, according to La Vanguardia.

Several South Asian rulers are said to have died tragically from the stone. It eventually reached the Sikh kingdom and was handed over to Queen Victoria of England in 1877 by its 10-year-old emperor Duleep Singh.

These are the five stages of the coronation ceremony of Carlos III

A reminder of the colonial past

Indian Prime Minister Narendra Modi told The Telegraph newspaper that wearing the Koh-i-Noor diamond would only bring back “painful memories of the colonial past”.

As a result, Camilla avoided the conflict and swapped the gem for the heart-shaped Cullinan V worn by Queen Elizabeth II as a brooch, Who magazine reported.

Also returned to the crown of Mary of Teck were the 94.4-carat pear-shaped Cullinan III and the 63.6-carat square Cullinan IV, diamonds that had been removed from the tiaras.