query: What is the most expensive type of wool?
passage: Vicuña
The vicuña (Vicugna vicugna) or vicuna[2] (both /vɪˈkuːnjə/, very rarely spelled vicugna, which is actually the name of its genus)[3][4] is one of the two wild South American camelids which live in the high alpine areas of the Andes, the other being the guanaco. It is a relative of the llama, and is now believed to be the wild ancestor of domesticated alpacas, which are raised for their coats. Vicuñas produce small amounts of extremely fine wool, which is very expensive because the animal can only be shorn every three years, and has to be caught from the wild. When knitted together, the product of the vicuña's wool is very soft and warm. The Inca valued vicuñas highly for their wool, and it was against the law for anyone but royalty to wear vicuña garments; today the vicuña is the national animal of Peru and appears in the Peruvian coat of arms.
passage: Fur clothing
Fur clothing is clothing made of furry animal hides. Fur is one of the oldest forms of clothing, and is thought to have been widely used as hominids first expanded outside Africa. Some view fur as luxurious and warm; however, others reject it due to moral concerns for animal rights. The term 'fur' is often used to refer to a coat, wrap, or shawl made from the fur of animals. Controversy exists regarding the wearing of fur coats, due to animal cruelty concerns. The most popular kinds of fur in the 1960s (known as the luxury fur) were blond mink, silver striped fox and red fox. These were mainly bought by the rich. Those who could not afford this wore pelts of wolf, Persian lamb or muskrat. It was common for ladies to wear a matching hat. However, in the 1950s, a 'must have' type of fur was the mutation fur (naturally nuanced colours) and fur trimmings on a coat that were beaver, lamb fur, Astrakhan and mink. To this day, some people consider fur as a trend and wear it.