Vermiculite Photos      

Cochise College       
Photos of Minerals
Geology Home Page
Roger Weller, geology instructor               


last edited:  2/26/18    number of photos:  5 
Vermiculite is altered mica that contains water between the mica sheets.  When heated
to a high temperature, the water converts to steam and the mineral expands like popcorn.
The puffed up structure provides excellent insulation and when mixed with plant soil it
helps retain water.  The largest vermiculite mine is in Libby, Montana.

vermiculite:  1  2  3  4  5

Photos are copyright free for non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.
copyright 2018-R.Weller