Turbinella pyrum is a large marine predatory snail. It belongs to the family Turbinellidae. The shell length of this species up to 150 mm.
This specimen of shell has unusual appearance, because it is a shankha. Shankha shells are religious items used in Buddhism and Hinduism. It is on display in temporary exhibition The Story of Tibet in Náprstek Museum of Asian, African and American Cultures in Prague.
This shankha comes from Tibet or from Mongolia. It was used as a regilious ritual item in Tibetan Buddhism. The shell of this specimen is decorated with a metal plate, that gives the ability to use this shell as a trumpet.
Wikipedia contributors 2017: Shankha. accessed 29 July 2017.