GIA report online : 7338513082 Shape....................... oval Cutting style................ brilliant cut Color......yellowish green change to brownish yellow Species................... Natural Chrysoberyl Variety...................... Natural Alexandrite Geographic origin........ Srilanka Ceylon Weight : 16.76 carats Measurements : 15.23x13.94x9.97mm 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 #exclusiveselection