Corundum Photos 
Cochise College               
Photos of Minerals
Geology Home Page

Roger Weller, geology instructor

wellerr@cochise.edu     copyright 2010-R.Weller 

 
corundum-ruby crystal-1
Ruby is a variety of the mineral corundum.  It is the same chemical, aluminum
oxide, that forms on the surface of aluminum cooking pots and creates a dull
surface.  Corundum can come in many colors, but only the red varieties are
called rubies. 
 

corundum                                                                                                                                         20
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.