Diamonds of the Earth

March 19 (Bloomberg) –- Affectionately known as "The Truffle Lady of New York," Francesca Sparvoli's company, Done4NY, supplies rare truffles to high-end New York City restaurants. Truffles are one of the most expensive perishable food items in the world, a pound cost upwards of $750. Francesca takes Bloomberg behind kitchen doors and into the secretive world of the truffle trade.