The three most expensive fabrics are Vicuña wool, Mulberry silk and genuine pashmina. Vicuña wool is source from the Vicuña in the Andes mountains and is considered rare.
Mulberry silk is a luxurious, durable and smooth fabric which is of high quality and delicate, making it a most expensive fabric. Pashmina is just as expensive as these fabrics, popular for its warmth and fine craftsmanship. These fabrics easily find themselves into the high end luxury fashion and designer collections.