IGI Certified Hackmanite ( Sodalite ) . It has sky blue color tone with sparkling luster, it has feather’s & visible inclusions but less visible than in the photos. It’s quite rare to find gem grade hackmanite. It has strong fluorescence & its unusual gem, it exhibits a special optical property know as tenebrescence,” a type of reversible photochromism . This feature allows gems to temporarily change color when exposed to different light form . There are very limited production of deep purple color of hackmanite. Rare Gem Collectors IGI Report No : 706542353 Weight : 5.81 ctw Color : Deep Purple Cut : Pear Mixed Cut Measurements : 15.04 x 10.46 x 8.41 mm Characteristics : Natural inclusions pattern Comment : Tenebrescence Effect No indication of thermal treatment/ Not mentioned in report Origin:Badakshan Afghanistan / Not mentioned in report Shipping will be via FedEx with full insurance