GIA report online :5222640507 Shape......................Octagonal Cutting style ...............Brilliant cut Color....................Yellow-Green changing to Brown-yellow Species............... Natural Chrysoberyl Variety.................Natural Alexandrite Geographic origin....... Sri Lanka Treatment : No indication of heating Weight : 4.20 carats Measurements : 9.17 x 7.99 x 5.86mm Comments : None The stone was selected by Tal Naaman ,Gem Hunter and sent to the GIA Lab in New York Country of Origin is an opinion offered by the seller of this item; this opinion is not substantiated by an official opinion of the Laboratory Insured international shipping with Track & Trace