Opal
Photos Cochise College
Photos of Gemstones Translucent Gemstones
Virtual Geology Museum Hall of Gemstones
Opal
Photos Roger Weller, geology instructor
wellerr@cochise.edu copyright 2008
blue opal pendant-A
Arizona
Photo is copyright free for non-commercial educational uses.
Just credit
photo to R.Weller/Cochise College.