 Complete the following phrase:  The diamond now known as the Sancy began as an even larger diamond called the Balle de Flandres with a possible weight of over . The Balle was part of the dowry of Valentina Visconti when she married Louis I, Duke of Orléans the younger brother of King Charles VI of France in 1398. While the precise path of ownership over the next 75 years is uncertain, the stone found its way to Charles the Bold, Duke of Burgundy, who lost it together with an array of other treasures - including his silver bath and the Three Brothers jewel - in the 