black star sapphire-A
 

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

Gemstone courtesy of Neotric Gems, Inc.
Specializing in high quality gemstones
P.O. Box 260364, Plano, Texas 75026
(972) 312-1511
neotricgems@yahoo.com