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

Geology Home Page

Roger Weller, geology instructor

wellerr@cochise.edu     copyright 2008-R.Weller 

 
common corundum crystals-1
Corundum is simply aluminum oxide.  The mineral corundum typically crystallizes
in the form of hexagonal prisms with flat ends.  The sides of these hexagonal prisms
are often very rough and ragged.  Only if the corundum is colorful and transparent
will it be classified as ruby or sapphire.
 

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