I found this rock along the Illinois river basin in cave junction, oregon. It was laying on the top layer of a massive beach of rock. It's shape is what drew me too it, then after closer inspection I'm unable to quite nail down what it may be. It looks as if it was deliberately shaped this way and it has a very distinct ring around the smaller pointed Base of the rock the rock is extremely dense and heavy and when you rub along the top of it makes a ringing sound. It has gray and dark gray specks and is dull in appearance. It is Bumpy and uneven but still shape to form an obvious point at one end and flat on the other end. The length is exactly 13 inches 8.5 inches at its widest point. The ring is 10 inches from the bottom. Full image of rock1
Your stone looks like prehistoric pestle from a mortar and pestle. The ring around the narrow holding end seems to be somewhat common for these types of tools. A quick search for "prehistoric mortar and pestle" will show a number of stones with a similar shape. I highly doubt that the shape you see is natural, though there are always exceptions. Your picture is not clear enough to make out the individual crystals so I would guess that the rock is some type of granite or grano-diorite.