Roger Weller, geology instructor
[email protected] copyright 2011-R.Weller
citrine geodes from
Brazil-3
At the 2010 Tucson Gem and Mineral Shows
Citrine was produced by heat treating
amethyst.
quartz-citrine
1687
Photo is copyright free for
non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.