Why did pomos use clamshells for jewerly?

The Pomo people used clamshells for jewelry primarily because of their beauty, durability, and cultural significance. The shiny, iridescent surface of clamshells made them attractive for adornment, while their availability along the California coast facilitated their use. Additionally, clamshell jewelry often held spiritual and social meanings within Pomo culture, symbolizing status, identity, and connection to the natural world.