Kempite, Baryte
San Jose Mine, East Foothills, Black Wonder Mining District, Santa Clara County, California, USA
Small crystal of transparent kempite, on a bed of kempite altering to some reddish crude which may contain rhodochrosite, with white barite and blackish hausmannite.
This is from the type locality, a "large boulder situated on the bank of Penitencia Creek, below Alum Rock Park, about five miles east of San Jose, Santa Clara County, California" ...
© 2016, JGW