GIA report online : 2225454720 Shape.....................Octagonal Cutting style ...............Modified brilliant cut Color..................... Yellow Green changing to Yellow Brown Species............... Natural Chrysoberyl Variety.................Natural Alexandrite Geographic origin....... Sri lanka Treatment : No indications of heating Weight : 3.17 carats Measurements : 10.50 x 6.47 x 4.26 mm 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