Item No : 6673588 Gemstone Type : Natural Unheated 6 Rays Burma Red Ruby Star Oldmine Approx. Weight (ct) : 7.75 Ct. Shape : Oval Cabochan Size/Dimension : 12 x 10.5 MM Color : Red Clarity : Opaque Luster : Good Origin : India Hardness : 9 Specific Gravity : 3.9 - 4.1 Refractive Index : 1.76 - 1.78 Chemical Composition : Al2O3 Treatment : Unheated Quantity : 1 Pc (s)