I had to look closely at this specimen to really believe that it is from Arkansas - but it is, and as such, it is truly rare and sensational! As you know, Arkansas has produced very few smoky specimens, and vanishingly few of this quality and size. But the proof that this is natural and not heated is in the little microcrystals of clear quartz that grew in a secondary generation on two of the faces of the large crystal. Ex. Rebecca Stewart Collection.