Item No : 269905 Gemstone Type : Natural Rutile Quartz With Black Needles Approx. Weight (ct) : 13.00 Ct. Shape : Pear Size/Dimension : 19 x 14 MM Color : Black Needles Clarity : Transparent Luster : Good Origin : Africa Hardness : 7 Specific Gravity : 2.65 - 2.91 Refractive Index : 1.544- 1.553 Chemical Composition : Si02 Treatment : Natural