Gemstone Type : Natural Blue Kyanite Sapphire Color Approx. Weight (ct) : 2.05 Cts. Shape : Oval Cabochan Size/Dimension : 9 x 6.5 MM Depth : 3 MM Color : Blue Clarity : Transparent Luster : Good Origin : Africa Hardness : 7 Specific Gravity : 3.57 - 3.67 Refractive Index : 1.71 - 1.73 Chemical Composition : Al2SiO5 Treatment : Natural