Gem Name : Tanzanite Species : Natural Zoisite Weight : 3.93 cts Pieces : 1 pcs Size ( approx. ) : 9.51 x 9.49 x 5.83 mm Shape /Cut : Cushion Color : Bluish Violet Treatment : See Comments Comments : Tanzanite is commonly heated to improve or change the color. Color authenticity is currently undeterminable Certificate : ICA TH26G1123910 The Origin and Treatment declarations are the opinion of the seller. A. All pictures are taken in normal daylight. B. We only send via Registered Post (transit time usually 15 to 30 working days). C. For express shipping there is an additional charge. D. If you have any questions about the gemstones, please ask before bidding in order to prevent avoidable returns.