Roger Weller, geology instructor
firstname.lastname@example.org copyright 2016-R.Weller
orthoclase, perthitic structure, microscopic-2
cleavage planes and perthitic structure (x30)
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Specimen courtesy of Greg Davis
The Granite Gallery, 79 North Schraeder Road, Sierra Vista, Arizona 85635