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
Brazil

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.