Natural Pink Opal, Approx. Weight (ct) : 38.15 Cts. Oval, Size/Dimension : 26 x 21 MM Depth : 12 MM, Color : Pink , Clarity : Translucent , Luster : Good Origin : Peru Hardness : 6 , Specific Gravity : 1.42 - 2.25 Refractive Index : 1.544- 1.553, Chemical Composition : SiO2nH2O, Treatment : Natural