Narrator: Lotus silk is one of the rarest fabrics in the world, produced only in small ... So just how is it made, and what makes it so expensive? Phan Thi Thuan's family have been making silk ...

To Japanese denim and vicuña wool. We unraveled the stories behind the world's most expensive fabrics and textiles. More from News From Muga silk and leavers lace. To Japanese denim and vicuña wool.