Boothite, Pyrite
Alma Mine, Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Alameda County, California, USA
Translucent boothite fibrous aggregates, with small tarnished pyrite grains.
Specimen courtesy of Excalibur Mineral Company.
2.0 cm field of view, horizontal. S040-32
© 2009, JGW, courtesy Photographic Guide to Mineral Species