The Conch or Dung

Conch shell trumpets are found in almost every coastal region of the world and in many inland areas as well. They are one of the oldest instruments in the world made from cutting off the top spiral of a conch shell and played by blowing into the resulting opening. They are widely used as a ceremonial and religeous instruments(widely used in Buddhist rituals) but have also been used for centuries as a signal horn.

The instrument pictured is the Tibetan dung used in Buddhist ceremonies.

Tibetan Conchs
Amazing small conch horn with engraved metal