Quartz Photos
Cochise College               
Photos of Minerals
Virtual Geology Museum      Hall of Minerals

Geology Home Page

Roger Weller, geology instructor

wellerr@cochise.edu    copyright 2014-R.Weller

citrine crystals-4

close view of an amethyst crystals converted to citrine

Heating amethyst turns it yellow.

quartz-citrine                                                                                                                                4584
Photo is copyright free for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.