Snake-stone

A snake-stone, also known as a '''viper's stone, snake's pearl, black stone, serpent-stone, or nagamani''' is an animal bone or stone used as folk medicine for snake bite in Africa, South America, India and Asia.

The early Celtic era European adder stone is also called a snake stone, and is usually made from coloured glass, often with holes. Its purpose is for protection against evil spirits rather than snake bite.

The World Health Organization states that it has no effect on snake-bites, bearing in mind that most snake-bites are from non-venomous snakes. They state that traditional medicines and other treatments such as wound incision or excision, suction, or application of "black stones" should be avoided. Provided by Wikipedia