German Prince to sell historic ‘Beau Sancy’ diamond

Georg Friedrich Ferdinand, Prince of Prussia, head of the Imperial House of Hohenzollern and great-great-grandson of Wilhelm II, the last Kaiser of Germany, is selling a diamond that has been part of the crown jewels of France, Holland, England, Prussia and the German Empire. Known as the “Beau Sancy,” the 35-carat modified pear double rose …