Roger Weller, geology instructor
[email protected] copyright 2011-R.Weller
quartz-Pecos
"diamond"-2
Pecos River, New Mexico
A Pecos diamond is a doubly terminated quartz
crystal,
colored by inclusions of gypsum
quartz
5026
Photo is copyright free for
non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.