GIA report online : 5211239445 Shape......................Octagonal Cutting style ............... brilliant cut Color..................... Violetish Blue Species............... Natural Corundum Variety.................Natural Sapphire Geographic origin....... Sri Lanka Treatment : No Indications of Heating Weight : 6.40 carats Measurements : 11.41 x 8.45 x 6.77 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