Roger Weller, geology instructor
firstname.lastname@example.org copyright 2011-R.Weller
dioptase and cerussite
Tiger, Pinal County, Arizona
Actual specimen has more of a green color than blue-green;
digital cameras have difficulty in recording the color of dioptase.
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College