Gemstone Type : Natural Green Emerald Approx. Weight (ct) : 0.70 Cts. Shape : Oval Size/Dimension : 7 x 5 MM Depth : 3 MM Color : Green Clarity : Translucent Luster : Good Origin : Colombia Hardness : 7.5 Specific Gravity : 2.67 - 2.84 Refractive Index : 1.56 - 1.59 Chemical Composition : Be3al2(Sio3)6 Treatment : Natural