European white truffles sell for as much as $3,600 a pound, but harvests are down and a black market has emerged — none of which has dampened the appetite for this prized fungi. Lesley Stahl reports. Watch more HERE: Don’t forget to SUBSCRIBE! 60 minutesblackcbsCookingCuisineDiningemergeexpensivefoodFranceFrenchfrench cuisineFrench diningluxuryMarketMoneySchooltruffletrufflesVideoVlogworldYouTube