Pitchstone Photos                     

Cochise College
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Roger Weller, geology instructor                       

wellerr@cochise.edu

Pitchstone
last edited:  11/27/07    number of photos:  5
Pitchstone is a volcanic glass that has a duller surface than
regular obsidian. 
In some cases, it is an obsidian that has started to devitrify. 
The surface also has a broken-up texture.

photos
pitchstone:  1  2  3
pitchstone from California:  1  2
 

Photos are copyright free for non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.
copyright 2007-R.Weller