The rare, fragrant, flavorful and extremely expensive white truffles that grow in Alba, Italy can put you back nearly $7,000 a pound. It’s the reason why Japanese company, Cellato, broke the Guinness record for the world’s priciest ice cream, a brand called Byakuya that would set you back $6,696 per serving. According to the company, 'It took us over 1.5 years to develop, with a lot of tria...