minor footnote: serpentine is interesting as the state rock and a host for gold, and also as a host for chrysotile asbestos. there was some discussion five or t

minor footnote: serpentine is interesting as the state rock and a host for gold, and also as a host for chrysotile asbestos. there was some discussion five or ten years back about changing California's state rock to something else because of that. http://www.nytimes.com/2010/07/14/us/14rock.html http://www.nytimes.com/2010/07/14/us/14rock.html