Roger Weller, geology instructor
email@example.com copyright 2010-R.Weller
faceted blue topaz-irradiated
When exposed to radiation from a nuclear reactor, colorless topaz turns blue colored.
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Gemstones courtesy of Rakhi Gems
Aby Kothari and Kushal Jain
Specializing in faceted and cabochon gemstones