A woman poses with the 'Le Grand Mazarin', a 19.07 carat pink diamond, at Christie's auction house in London on October 17, 2017. 
'Le Grand Mazarin' is estimated to reach 6-9 million dollars on auction in Geneva on November 14, 2017.  / AFP PHOTO / CHRIS J RATCLIFFE        (Photo credit should read CHRIS J RATCLIFFE/AFP/Getty Images)