This may be a long shot but thought id try it here. Maybe someone knows more about this than me. I have a tanzanite stone my great aunt left me ive taken it to several jewlery stores that have confirmed its real and that the price sticker is pretty accurate to its value. But for the life of me I cant find anywhere that will actually grade it or certify a colored stone ive found plenty that will do diamonds but not colored stones. If anybody has any knowledge, wants to buy it, or trade a gun for it let me know! Im open to anything