Important aspects of Chavin ritual activity and practice have been discovered to be processions, offerings of different materials (exotic and valuable), and the use of water. One of these offerings can be connected to the smashed pieces of obsidian found along with fragments of mirror. Other ceremonial acts for the Chavin included the smashing of pots and ceremonies surrounding the use of fire, held within certain areas of the Chavin site as a part of their ritual. Artifacts in the temples relay the ritual practice of offerings. Ceramics, for example, were believed to be offerings brought by the pilgrims. Another artifact was a conch shell, used as a trumpet. Art suggests that processions were essential to disclosing that processions were an important part of Chavin ritual. Other ritual practices were produced by the shamans, such as divination, celestial observations, calendar calculations, health, and healing.