Item No : 5233017 Gemstone Type : Natural Burma Gray Blue Star Sapphire Approx. Weight (ct) : 4.60 Ct. Shape : Oval Size/Dimension : 9 x 8.5 MM Color : Gray Blue Clarity : Transparent Luster : Good Origin : Burma Hardness : 9 Specific Gravity : 3.9 - 4.1 Refractive Index : 1.76 - 1.78 Chemical Composition : Al203 Treatment : Natural Quantity : 1 Pc (s)