The Hapsburg family of Austria possessed a 133-carat rare pink gemstone, a Florentine Diamond. At the end of World War I, the royal family was overthrown and with the intention of keeping the diamond safe, the family trusted its lawyer to keep it a safety deposit box at a Swiss Bank.
The family had in mind a plan to sell the diamond and reap a huge amount of profit but their lawyer was found guilty of fraud and theft, but before that, the diamond was long gone. People believe that it was divided into smaller pieces, but no proof for the same exists.