Roger Weller, geology instructor
[email protected] copyright 2011-R.Weller
citrine crystals-2
close view of an amethyst
geode made into citrine
Brazil
Heating amethyst turns it yellow.
quartz-citrine
3189
Photo is copyright free for
non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.
Specimen courtesy of Village Originals