Schitterende Rode Rutielkwarts 13 x 10 mm Ovale Cabochon 4.55 CT. Color : Red Brown Needles Clarity : Translucent Luster : Good Origin : Africa Hardness : 7 Specific Gravity : 2.65 - 2.91 Refractive Index : 1.544 - 1.553 Chemical Composition :SiO2 Treatment : None