Gemstone Type : Natural Ruby Approx. Weight (ct) : 1.75 Ct. Shape: Oval Size/Dimension (LxHxW) : 8.1 x 6.2 x 3.3 MM Color : Red Clarity : Transparent Luster : Good Origin : Africa Hardness : 9 Specific Gravity : 3.9 - 4.1 Refractive Index : 1.76 - 1.78 Chemical Composition : Al203