BRITAIN-FRANCE-ROYALS-HISTORY-JEWELLRY-AUCTION-AUSTRIA-ITALY

A model wears The 'Queen Marie Antoinette's Pearl' with an estimated value of £767,500-£1,534,000 GBP (872,500-1,743,000 Euros, $1,000,000-2,000,000 USD) on Queen Marie Antoinette's pearl and diamond necklace, together with a Queen Marie Antoinette's diamond brooch (L) during a photocall for the sale of 'Royal Jewels from the Bourbon Parma Family' at Sotheby's auction house in London on October 19, 2018. - One of the most important royal jewellery collections ever to come to auction comes for sale at Sothebys in Geneva on November 14, 2018. Entitled Royal Jewels from the Bourbon-Parma Family, the auction will span centuries of European history, from the reign of Louis XVI to the fall of the Austro-Hungarian Empire. (Photo by Daniel LEAL / AFP) (Photo by DANIEL LEAL/AFP via Getty Images)