GIA report online : 7431970346 Shape......................Cushion Cutting style............... Modified brilliant cut Color.................... Greenish Blue Species............... Tourmaline Item Description: One loose stone Weight : 17.29 carats Measurements : 15.10 x 14.08 x 11.00 mm 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