Roger Weller, geology instructor
email@example.com copyright 2010-R.Weller
The green color is from the presence of malachite and the dark blue is due to azurite.
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Chrysocolla courtesy of Barlows
Specializing in chrysocolla
Bruce and Debbie Barlow
P.O. Box 4091, Cave Creek, AZ 85327