Basalt
Cochise College
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Roger Weller, geology instructor                       

wellerr@cochise.edu    copyright 2007

basalt with olivine-1
San Carlos Indian Reservation, Arizona
This specimen came from a classic location: a small lava flow on the San Carlos
Indian Reservation west of Safford, Arizona.  This location is a prime source of
gem grade olivine (peridot).


Photo is copyright free for non-commercial educational uses. 
Just credit photo to R.Weller/Cochise College.