[HIGHLIGHTS] The last descendant of the Medici, on the trail of the legendary diamond lost by his family: "We cannot rule out that it appears in an auction house"

The last descendant of the Medici, on the trail of the legendary diamond lost by his family: "We cannot rule out that it appears in an auction house" A century ago, the 'New York Times' estimated the value of the piece. Today it would cost 300 million.

Mary Magdalene of Austria (1589-1631), Grand Duchess of Tuscany, wears the diamond in her tiara in this portrait by Justus Sustermans. The writer Lorenzo de Médici follows the trail in his book 'El Fiorentino'