It is a piece of rock that has been in water. Water over time rounds the edges of even the hardest rock. You can find similar ones in many streams. The white vein is probably a vein of quartz. Occasionally in some parts of the country you will find carbonates that form this shape.

Little hint. Fossils' are the remains of plants and animal material that has over time changed into rock. If the material is soft it is not a fossil.

Maifleur01 They say it is Concretion ? On Fossil forums and this concretion is hard not soft. Thank you for your time

Sorry JrFinds but concretions are not normally of igneous rock which is what this one looks like. Look up how concretions are formed.

It's granite ....just a round piece of granite. A fossil is "something" imbedded in a rock.

Maifleur01 I am not saying your wrong and did look up Concretion how they formed and i not saying they are wrong . but from what i feel and see, i think it's need to be look at by expert person who know about this more. Tell me do you know someone in San Francisco Ca. ? that came look at it ?

Take it to any college that has a Geology Department and ask one of the professors.

Looks like weathered granite to me. You can take it to a local museum with a geology display and compare. I doubt if a geology professor at most colleges will have the time to ID it. When I worked in the natural sciences at a museum we were inundated with requests. Unless someone at a lower level than the curatorial staff saw something unusual, it would not make it up the chain of command. For good reason.

Somehow I think he wants a real expert. Which is why the Geology Department. He could look on line also for red granite or chalcedony which is what I think it may be.

I'm wondering if it's a agate. Is it unusually heavy compared to other rocks the same size? Is the surface smooth slippery almost greasy feel. It has the motteld of appearance of outside of a agate also I would be so tempted to crack it open to see inside. Maybe you can find some old rock hound that has the equipment to cut it open.

Said as a lifelong amateur collector of lake Superior agates.

Concretions normally are deposits that encase another object, often plant material, but can be another pebble. Those found in the Braidwood area in Illinois contain mostly leaves, stems, and nuts. A few do have ancient animal material (See Tully Monster). The shape of concretions can vary from spherical to elongated flattened blobs. A concretion is sedimentary material that has been infused and hardened to rock. Its hardness can vary from mud-stone to harder, but ordinarily not as tough as limestone, granite, or quartz.

Your stone appears to be in the quartz family and beach or stream worn. Several more characteristics are needed to narrow down what it might be. One test that is within the capabilities of the average rock collector is hardness on the Mohs scale. Inexpensive sets of hardness picks are available for this. It does require a bit of instruction and practice to use these. Another characteristic is density - how much does it weight per volume. An amateur can determine this by weighing the stone in water and out of water, then insert these numbers in little formula that will compute density relative to the weight of water. My guess, and its only a guess, that its a quartzite rock that has been beach tumbled with other stones.