Alexandrite Photos           
Cochise College                                                                                                                      
Photos of Gemstones
Transparent Gemstones
Geology Home Page
Roger Weller, geology instructor               


last edited:  2/26/18    number of photos:  2
Alexandrite is chrysoberyl, BeAl2O4
hardness: 8.5

Alexandrite is famous for its color change under different lighting
conditions.  This gem appears greenish under sunlight and reddish
under tungsten light due to the presence of chromium.
Alexandrite was discovered in 1830 in Russia and was named after
Czar Alexander II.


faceted alexandrite
alexandrite, faceted:  A  B


Photos are copyright free for non-commercial educational uses. 
Just credit photos to R.Weller/Cochise College.

copyright 2018-R.Weller