Information about the official state rock of California.
From the California State Library: Serpentine
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.
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