Quartz
PhotosRoger Weller, geology instructor
wellerr@cochise.edu copyright 2014-R.Weller
citrine geode from
Brazil-7
At the 2014 Tucson Gem and Mineral Shows
Citrine was produced by heat treating
amethyst.

quartz-citrine
4587
Photo is copyright free for
non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.