It is thought that some of the diamonds may have come from the necklace linked to a scandal that contributed Marie-Antoinette's death, Sotheby's said.

The diamond necklace was worn at the coronation of two English monarchs and was created in the decade before the French revolution.

The 300-carat diamond necklace is rumored to have ties to the scandal of the "Affair of the Necklace" and advent of the French Revolution.

Sotheby's will auction an 18th-century necklace with 500 diamonds, potentially linked to Marie Antoinette, on November 11.

The diamond necklace weighs approximately 300 carats and was made in the 18th century, likely a decade before the French Revolution. This sale is the first time the jewel will be exhibited in the last 50 years.