I believe that Native American portable rock art is a myth. Granted, there are carvings, there are statues and there are idols, but if you don't see something definitive right away, such as a man, a buffalo, or an eagle, or even an animal you can't identify, then it's just a rock. True rock art, is the stuff you see that is carved, painted or sculpted and even a blind man can see what it is. The Native Americans didn't waste their time on crappy rocks. When they made something, they did it with quality and perfection in mind. You can pick up a rock, and turn it a thousand ways, and you can see a thousand animals. It's all in the eye of the person holding the rock. That's why I get mad when I see ebay listings showing just a normal rock, and the seller insist's that it is a rare NA effigy. NOT! Just a rock, so sell it as a rock, and not something rare trying to defraud somebody.
Sorry about my rant. :-) Needed to vent. I believe it is melted metal from a camp fire.
