Molly as with identifying any artifact, you have to look for the signs of human modification..not shape. I will try to make a more in-depth post on it later, when I can set up my camera to take pics. EVERYONE picks up geofacts and other items, mistaking them for artifacts. Me too, I brought home a buttload of limestone and shale concretions years ago thinking they were manufacturing....as a matter of fact, I probably still have some around here somewhere..lol. For the record..that piece that pick is showing looks like one killer-mo-diller cone!!! Jeeeeeeez, what's the material pickaway?