Roger Weller, geology instructor
firstname.lastname@example.org copyright 2010-R.Weller
Dioptase is a hydrous copper silicate that forms dark emerald-green stubby crystals.
It is a rare mineral that is highly prized by collectors because of its rich color and
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Specimen courtesy of Shawn Engle