Chalcedony
Photos Cochise College
Photos of Gemstones Translucent Gemstones
Virtual Geology Museum Hall of Rocks
Geology Home Page
Roger Weller, geology instructor
Chalcedony
Photos wellerr@cochise.edu copyright 2007
blue chalcedony cabochons-B
Photo is copyright free for non-commercial educational uses.
Just credit
photo to R.Weller/Cochise College.
Gemstones courtesy of Vista Gems
Specializing in
precious and semiprecious stones
Jay and Mona Khan
P.O. Box 184, Skillman, NJ 08558
(908)-218-5139