Tanzanite 4X3mm Oval Gemstone, MPN: TZ-Oval-TZ-0403-OVF-A, Genuine, Tanzanite, Heat treated, Purple. Stone Type_1: Tanzanite Stone Color_1: Blue Stone Weight_1: 0.200 ct Material: Primary: Gemstone Stone Shape_1: Oval Stone Size_1: 4.00 x 3.00 mm Stone Treatment_1: Heating Product Type: Stone Stone Cut_1: Faceted Stone Creation Method_1: Natural