Princess Diana was married to Prince Charles, 61, for 10 years, and the pair had two children – Prince William, 35, and Prince Harry, 33.
The late royal stated that she would leave her jewels to her sons for their wives to wear in the event of her death.
Kate Middleton, 36, has worn a number of Princess Diana’s jewels to date and Meghan Markle’s engagement ring contains two diamonds from Diana’s private collection.
The enormous piece of jewellery was actually a wedding gift to Diana from the Queen Mother.
While the piece was originally a brooch, Diana had the piece made into the stunning seven-strand pearl choker.
Diana wore the piece throughout her marriage and after her divorce, notably on the day she wore the “revenge dress”.
In June 1994 Diana stunned in a silk black dress and the choker at the Serpentine.
This was the same night Prince Charles appeared to admit to his affair with Camilla Parker Bowles in a television documentary.
The last time the stunning piece was worn by Princess Diana was in 1996 at the Metropolitan Museum Costume Institute Gala which featured a 50 year retrospective of Dior.
The necklace has not been seen since for 22 years. Will Kate Middleton or Meghan Markle ever wear it?
It has been reported that the two diamonds in Meghan’s engagement ring come from this piece, however, this has not been confirmed.
Has the piece been dismantled to create the piece for the LA-born actress?
The Royal Family are known for being inventive with their jewels, often having them reset, just as Diana did with this piece originally.
Perhaps we will see the enormous sapphire again, repurposed into a modern piece by Meghan or Kate.
How much is Meghan Markle’s engagement ring worth?
Grant Mobley, a gemologist and Director at Pluczenik, one of the world’s leading diamantaires estimates the ring would be worth around £122,500.