California State Rock


Serpentine rock

Photo of serpentine rock © Michael Baird, shot near Cayucos, CA: The Franciscan Mélange at Estero Bluffs (used by permission).


California has a greater number of minerals and a wider variety of rock types than does any other state. Serpentine, a shiny green and blue rock found throughout California, was named the official state rock in 1965. It contains the state's principal deposits of chromite, magnesite, and cinnabar. California was the first state to designate a state rock.