A diamond necklace that has been worn at two British coronations, and is thought to have stones from the infamous necklace at the heart of a Marie-Antoinette scandal, is expected to fetch up to $2.8 million at auction.

A rare diamond necklace with possible links to former French queen consort Marie Antoinette is to be auctioned in November with a price estimate of up to $2.8 million.

A mysterious 18th century necklace made from around 500 diamonds, some of which are believed to have been taken from a piece that contributed to Marie Antoinette's demise, will go on sale in November,

A rare antique diamond necklace which was worn at two British coronations is expected to sell for more than £1 million when it goes under the hammer. The 18th century diamond piece of approximately 300 carats was worn to King George VI and Queen Elizabeth ...